股本结构
单位：万股
| 公告日期 | 2025-11-04 | 2025-11-04 | 2025-07-31 | 2025-07-31 | 2025-05-01 | 2025-02-28 |
|---|---|---|---|---|---|---|
| 证券总股本 | 1266.06 | 1266.21 | 1266.35 | 1266.39 | 1266.74 | 1253.89 |
| 普通股本 | 1266.06 | 1266.21 | 1266.35 | 1266.39 | 1266.74 | 1253.89 |
| 优先股 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 |
| 其他 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 |
| 变动日期 | 2025-10-31 | 2025-09-30 | 2025-07-25 | 2025-06-30 | 2025-03-31 | 2025-01-31 |
注释：中概股证券总股本=普通股股本/
存托凭证比例
历史变动
| 公告日期 | 变动后普通股本（万股） | 变动后优先股（万股） | 变动原因 | 变动日期 |
|---|---|---|---|---|
| 2025-11-04 | 1266.06 | 未披露 | 定期报告 | 2025-10-31 |
| 2025-11-04 | 1266.21 | 未披露 |
更多>>
From June 30, 2025 to September 30, 2025
Forfeiture of restricted common stock
|
2025-09-30 |
| 2025-07-31 | 1266.35 | 未披露 | 定期报告 | 2025-07-25 |
| 2025-07-31 | 1266.39 | 未披露 |
更多>>
From March 31, 2025 to June 30, 2025
Forfeiture of restricted common stock
|
2025-06-30 |
| 2025-05-01 | 1266.74 | 未披露 |
更多>>
From December 31, 2024 to March 31, 2025
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2025-03-31 |
| 2025-02-28 | 1253.89 | 未披露 | 定期报告 | 2025-01-31 |
| 2025-02-28 | 1254.04 | 未披露 |
更多>>
From December 31, 2023 to December 31, 2024
Purchase of common stock
Issuance of restricted common stock
Forfeiture of restricted common stock
Cancellation of treasury shares
|
2024-12-31 |
| 2024-10-29 | 1254.53 | 未披露 | 定期报告 | 2024-10-25 |
| 2024-10-29 | 1254.78 | 未披露 |
更多>>
From June 30, 2024 to September 30, 2024
Purchases of common stock
|
2024-09-30 |
| 2024-07-31 | 1254.82 | 未披露 | 定期报告 | 2024-07-26 |
| 2024-07-31 | 1257.45 | 未披露 |
更多>>
From March 31, 2024 to June 30, 2024
Purchases of common stock
Issuance of restricted common stock
|
2024-06-30 |
| 2024-04-30 | 1262.00 | 未披露 | 定期报告 | 2024-04-26 |
| 2024-04-30 | 1270.49 | 未披露 |
更多>>
From December 31, 2023 to March 31, 2024
Purchases of common stock
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2024-03-31 |
| 2024-04-01 | 1274.40 | 未披露 | 定期报告 | 2024-03-18 |
| 2024-03-11 | 1275.67 | 未披露 | 定期报告 | 2024-03-01 |
| 2024-03-11 | 1276.18 | 未披露 |
更多>>
From December 31,2022 to December 31,2023
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase of treasury stock
|
2023-12-31 |
| 2023-11-03 | 1277.23 | 未披露 |
更多>>
From June 30, 2023 to September 30, 2023
Forfeiture of restricted common stock
|
2023-09-30 |
| 2023-05-05 | 1277.38 | 未披露 | 定期报告 | 2023-05-01 |
| 2023-05-05 | 1277.43 | 未披露 |
更多>>
From December 31, 2022 to March 31, 2023
Forfeiture of restricted common stock
|
2023-03-31 |
| 2023-03-10 | 1278.43 | 未披露 |
更多>>
From December 31, 2021 to December 31, 2022
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase of treasury stock
|
2022-12-31 |
| 2022-11-04 | 1247.98 | 未披露 |
更多>>
From June 30, 2022 to September 30, 2022
Forfeiture of restricted common stock
|
2022-09-30 |
| 2022-08-05 | 1248.48 | 未披露 |
更多>>
From March 31, 2022 to June 30, 2022
Forfeiture of restricted common stock
Repurchase of treasury stock
|
2022-06-30 |
| 2022-05-06 | 1251.75 | 未披露 |
更多>>
From December 31, 2021 to March 31, 2022
Forfeiture of restricted common stock
|
2022-03-31 |
| 2022-03-14 | 1251.80 | 未披露 | 定期报告 | 2022-03-01 |
| 2022-03-14 | 1252.20 | 未披露 |
更多>>
From December 31, 2020 to December 31, 2021
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2021-12-31 |
| 2021-11-05 | 1240.55 | 未披露 | 定期报告 | 2021-11-01 |
| 2021-11-05 | 1240.80 | 未披露 |
更多>>
From June 30, 2021 to September 30, 2021
Forfeiture of restricted common stock
|
2021-09-30 |
| 2021-08-06 | 1241.48 | 未披露 |
更多>>
from March 31, 2021 to June 30, 2021
Foreign currency translation adjustment, net of taxes of ($333)
Stock-based compensation expense
Change in unfunded SERP liability, net of taxes of ($28)
|
2021-06-30 |
| 2021-05-10 | 1234.25 | 未披露 | 定期报告 | 2021-05-01 |
| 2021-05-10 | 1234.55 | 未披露 |
更多>>
From December 31, 2020 to March 31, 2021
Forfeiture of restricted common stock
|
2021-03-31 |
| 2021-03-12 | 1234.95 | 未披露 | 定期报告 | 2021-03-01 |
| 2021-03-12 | 1235.35 | 未披露 |
更多>>
From December 31, 2019 to December 31, 2020
Forfeiture of restricted common stock
Issuance of restricted common stock
|
2020-12-31 |
| 2020-11-06 | 1235.93 | 未披露 | 定期报告 | 2020-11-01 |
| 2020-11-06 | 1236.23 | 未披露 |
更多>>
From June 30, 2020 to September 30, 2020
Forfeiture of restricted common stock
|
2020-09-30 |
| 2020-08-10 | 1237.75 | 未披露 | 定期报告 | 2020-08-01 |
| 2020-08-10 | 1237.85 | 未披露 |
更多>>
From March 31, 2020 to June 30, 2020
Forfeiture of restricted common stock
|
2020-06-30 |
| 2020-05-08 | 1226.55 | 未披露 |
更多>>
From December 31, 2019 to March 31, 2020
Forfeiture of restricted common stock
|
2020-03-31 |
| 2020-03-25 | 1226.85 | 未披露 | 定期报告 | 2020-03-01 |
| 2020-03-25 | 1227.25 | 未披露 |
更多>>
From December 31, 2018 to December 31, 2019
Repurchase of Class A common stock
Forfeiture of restricted common stock
Issuance of stock awards
|
2019-12-31 |
| 2019-11-12 | 1227.35 | 未披露 | 定期报告 | 2019-11-01 |
| 2019-11-12 | 1227.70 | 未披露 |
更多>>
from June 30, 2019 to September 30, 2019
Repurchase of Class A common stock
Forfeiture of restricted common stock
|
2019-09-30 |
| 2019-08-06 | 1231.65 | 未披露 |
更多>>
From March 31, 2019 to June 30, 2019
Net earnings
Class A Common Stock, $0.06/share
Class B Common Stock, $0.07/share
Foreign currency translation adjustment, net of taxes of $16
Stock-based compensation expense
Change in unfunded SERP liability, net of taxes of ($11)
|
2019-06-30 |
| 2019-05-09 | 1225.00 | 未披露 | 定期报告 | 2019-05-01 |
| 2019-05-09 | 1226.00 | 未披露 |
更多>>
from December 31, 2018 to March 31, 2019
Forfeiture of restricted common stock
|
2019-03-31 |
| 2019-03-08 | 1226.48 | 未披露 | 定期报告 | 2019-03-01 |
| 2019-03-08 | 1226.73 | 未披露 |
更多>>
from December 31, 2017 to December 31, 2018
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2018-12-31 |
| 2018-11-07 | 1224.73 | 未披露 | 定期报告 | 2018-09-30 |
| 2018-08-07 | 1201.25 | 未披露 | 定期报告 | 2018-08-01 |
| 2018-08-07 | 1201.38 | 未披露 | 定期报告 | 2018-06-30 |
| 2018-05-10 | 1202.20 | 未披露 | 定期报告 | 2018-03-31 |
| 2018-03-09 | 1203.43 | 未披露 |
更多>>
from December 31, 2016 to December 31, 2017
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2017-12-31 |
| 2017-11-06 | 1203.37 | 未披露 | 定期报告 | 2017-11-01 |
| 2017-11-06 | 1203.57 | 未披露 | 定期报告 | 2017-09-30 |
| 2017-08-04 | 1204.38 | 未披露 | 定期报告 | 2017-08-01 |
| 2017-08-04 | 1204.40 | 未披露 | 定期报告 | 2017-06-30 |
| 2017-05-05 | 1201.39 | 未披露 | 定期报告 | 2017-03-31 |
| 2017-04-11 | 1202.14 | 未披露 | 定期报告 | 2017-03-28 |
| 2017-03-10 | 1202.66 | 未披露 |
更多>>
From December 31, 2015 to December 31, 2016
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2016-12-31 |
| 2016-11-07 | 1193.36 | 未披露 | 定期报告 | 2016-09-30 |
| 2016-08-04 | 1193.86 | 未披露 | 定期报告 | 2016-06-30 |
| 2016-05-10 | 1186.56 | 未披露 | 定期报告 | 2016-05-02 |
| 2016-05-10 | 1186.63 | 未披露 | 定期报告 | 2016-03-31 |
| 2016-03-11 | 1187.69 | 未披露 |
更多>>
from December 31, 2014 to December 31, 2015
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2015-12-31 |
| 2015-11-06 | 1188.86 | 未披露 | 定期报告 | 2015-09-30 |
| 2015-08-07 | 1189.86 | 未披露 | 定期报告 | 2015-08-01 |
| 2015-08-07 | 1190.06 | 未披露 | 定期报告 | 2015-06-30 |
| 2015-05-08 | 1183.17 | 未披露 | 定期报告 | 2015-05-01 |
| 2015-05-08 | 1183.84 | 未披露 | 定期报告 | 2015-03-31 |
| 2015-03-13 | 1185.54 | 未披露 | 定期报告 | 2015-03-01 |
| 2015-03-13 | 1186.17 | 未披露 |
更多>>
from December 31, 2013 to December 31, 2014
Issuance of restricted common stock
Forfeiture of restricted common stock
|
2014-12-31 |
| 2014-11-10 | 1187.98 | 未披露 | 定期报告 | 2014-09-30 |
| 2014-08-11 | 1187.78 | 未披露 | 定期报告 | 2014-06-30 |
| 2014-05-12 | 1150.86 | 未披露 | 定期报告 | 2014-03-31 |
| 2014-03-13 | 1151.06 | 未披露 |
更多>>
from December 31, 2012 to December 31, 2013
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase/retirement of Class B common stock
|
2013-12-31 |
| 2013-11-08 | 1139.88 | 未披露 | 定期报告 | 2013-11-01 |
| 2013-11-08 | 1140.02 | 未披露 | 定期报告 | 2013-09-30 |
| 2013-08-07 | 1140.98 | 未披露 | 定期报告 | 2013-08-01 |
| 2013-08-07 | 1141.06 | 未披露 | 定期报告 | 2013-06-30 |
| 2013-04-12 | 1136.60 | 未披露 | 定期报告 | 2013-04-05 |
| 2013-05-09 | 1136.61 | 未披露 | 定期报告 | 2013-03-31 |
| 2013-03-12 | 1136.77 | 未披露 | 定期报告 | 2013-03-01 |
| 2013-03-12 | 1154.71 | 未披露 |
更多>>
from December 31, 2011 to December 31, 2012
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase/retirement of Class B common stock
|
2012-12-31 |
| 2012-11-09 | 1169.31 | 未披露 | 定期报告 | 2012-11-01 |
| 2012-11-09 | 1182.85 | 未披露 | 定期报告 | 2012-09-30 |
| 2012-08-06 | 1190.05 | 未披露 | 定期报告 | 2012-06-30 |
| 2012-05-07 | 1180.26 | 未披露 | 定期报告 | 2012-03-31 |
| 2012-03-12 | 1180.86 | 未披露 | 定期报告 | 2012-03-01 |
| 2012-03-12 | 1181.06 | 未披露 |
更多>>
from December 31, 2010 to December 31, 2011
Issuance of restricted common stock
Termination of restricted common stock
|
2011-12-31 |
| 2011-11-04 | 1181.44 | 未披露 | 定期报告 | 2011-11-01 |
| 2011-11-04 | 1181.64 | 未披露 |
更多>>
From Jan 1 2011 to Sep 30 2011
Issuance of restricted common stock
Termination of restricted common stock
|
2011-09-30 |
| 2011-08-08 | 1182.06 | 未披露 |
更多>>
From Jan 1 2011 to Jun 30 2011
Issuance of restricted common stock
Termination of restricted common stock
|
2011-06-30 |
| 2011-05-06 | 1169.45 | 未披露 | 定期报告 | 2011-05-04 |
| 2011-05-06 | 1169.65 | 未披露 |
更多>>
Termination of restricted common stock
|
2011-03-31 |
| 2011-03-11 | 1170.23 | 未披露 |
更多>>
from December 31, 2009 to December 31, 2010
Issuance of restricted common stock
|
2010-12-31 |
| 2010-11-05 | 1170.29 | 未披露 |
更多>>
from January 1, 2010 to September 30, 2010
Issuance of restricted common stock
|
2010-09-30 |
| 2010-08-06 | 1170.40 | 未披露 |
更多>>
from January 1, 2010 to June 30, 2010
Issuance of restricted common stock
|
2010-06-30 |
| 2010-03-12 | 1163.93 | 未披露 |
更多>>
from December 31, 2008 to December 31, 2009
Repurchase/retirement of Class A common stock
Issuance of restricted common stock
Termination of restricted common stock
Return of unauthorized shares of common stock
|
2009-12-31 |
| 2009-03-13 | 1153.46 | 未披露 | 定期报告 | 2009-03-10 |
| 2009-03-13 | 1155.09 | 未披露 |
更多>>
from December 31, 2007 to December 31, 2008
Repurchase/retirement of Class A common stock
Exercise of stock options
Issuance of restricted common stock
Termination of restricted common stock
|
2008-12-31 |
| 2008-03-17 | 1181.76 | 未披露 | 定期报告 | 2008-03-10 |
| 2008-03-17 | 1183.23 | 未披露 |
更多>>
from December 31, 2006 to December 31, 2007
Repurchase/retirement of Class A common stock
Exercise of stock options
Issuance of restricted common stock
Termination of restricted common stock
|
2007-12-31 |
| 2007-03-16 | 1187.43 | 未披露 | 定期报告 | 2007-03-01 |
| 2007-03-16 | 1187.03 | 未披露 |
更多>>
from December 31, 2005 to December 31, 2006
Exercise of stock options
Issuance of restricted common stock
|
2006-12-31 |
| 2006-03-16 | 1176.24 | 未披露 | 定期报告 | 2006-03-01 |
| 2006-03-16 | 1171.59 | 未披露 |
更多>>
from December 31, 2004 to December 31, 2005
Exercise of stock options
Issuance of restricted common stock
|
2005-12-31 |
| 2005-03-31 | 1136.33 | 未披露 |
更多>>
from December 31, 2003 to December 31, 2004
Exercise of stock options
|
2004-12-31 |
| 2004-03-12 | 1121.69 | 未披露 | 定期报告 | 2004-03-01 |
| 2004-03-12 | 1116.24 | 未披露 |
更多>>
from December 31, 2002 to December 31, 2003
Exercise of stock options
|
2003-12-31 |
| 2003-03-26 | 1094.87 | 未披露 | 定期报告 | 2003-02-28 |
| 2003-03-26 | 1093.77 | 未披露 |
更多>>
from December 31, 2001 to December 31, 2002
Exercise of stock options
|
2002-12-31 |
| 2002-03-28 | 1085.74 | 未披露 | 定期报告 | 2002-03-01 |
| 2002-03-28 | 1076.98 | 未披露 |
更多>>
from December 31, 2000 to December 31, 2001
Exercise of stock options
|
2001-12-31 |
| 2001-03-19 | 1067.96 | 未披露 | 定期报告 | 2001-03-08 |
| 2001-03-19 | 1064.06 | 未披露 |
更多>>
from December 31, 1999 to December 31, 2000
Exercise of stock options
Purchase and retirement of common stock
|
2000-12-31 |
| 2000-03-29 | 1056.94 | 未披露 | 定期报告 | 2000-03-10 |
| 2000-03-29 | 1054.25 | 未披露 |
更多>>
from December 31, 1998 to December 31, 1999
Exercise of stock options
On November 5, 1999 the Board of Directors declared a two for one stock split to be paid in the form of a special dividend of one share of Class B common stock for each share of Class A and Class B outstanding. The special stock dividend was payable on December 1, 1999 to all Class A and Class B shareholders of record on November 22, 1999.
|
1999-12-31 |
| 1999-03-29 | 521.70 | 未披露 | 定期报告 | 1999-03-15 |
| 1999-03-29 | 520.66 | 未披露 |
更多>>
from December 31, 1997 to December 31, 1998
Exercise of stock options
Effect of splitting Common Stock into A and B shares
|
1998-12-31 |
| 1998-03-30 | 513.97 | 未披露 | 定期报告 | 1998-03-16 |
| 1998-03-30 | 512.19 | 未披露 |
更多>>
from December 31, 1996 to December 31, 1997
Exercise of stock options
|
1997-12-31 |
| 1997-03-31 | 507.32 | 未披露 | 定期报告 | 1997-03-15 |
| 1997-03-31 | 507.08 | 未披露 |
更多>>
from December 31, 1995 to December 31, 1996
Exercise of stock options
|
1996-12-31 |
| 1996-03-29 | 505.24 | 未披露 | 定期报告 | 1996-03-15 |
| 1996-03-29 | 505.14 | 未披露 |
更多>>
from December 31, 1994 to December 31, 1995
Exercise of stock options
|
1995-12-31 |
| 1995-03-30 | 497.44 | 未披露 | 定期报告 | 1995-03-15 |
| 1995-03-30 | 496.52 | 未披露 |
更多>>
from December 31, 1993 to December 31, 1994
Exercise of stock options
|
1994-12-31 |
| 1995-03-30 | 493.43 | 未披露 |
更多>>
from December 31, 1992 to December 31, 1993
Exercise of stock options
|
1993-12-31 |
From June 30, 2025 to September 30, 2025
Forfeiture of restricted common stock
From March 31, 2025 to June 30, 2025
Forfeiture of restricted common stock
From December 31, 2024 to March 31, 2025
Issuance of restricted common stock
Forfeiture of restricted common stock
From December 31, 2023 to December 31, 2024
Purchase of common stock
Issuance of restricted common stock
Forfeiture of restricted common stock
Cancellation of treasury shares
From June 30, 2024 to September 30, 2024
Purchases of common stock
From March 31, 2024 to June 30, 2024
Purchases of common stock
Issuance of restricted common stock
From December 31, 2023 to March 31, 2024
Purchases of common stock
Issuance of restricted common stock
Forfeiture of restricted common stock
From December 31,2022 to December 31,2023
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase of treasury stock
From June 30, 2023 to September 30, 2023
Forfeiture of restricted common stock
From December 31, 2022 to March 31, 2023
Forfeiture of restricted common stock
From December 31, 2021 to December 31, 2022
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase of treasury stock
From June 30, 2022 to September 30, 2022
Forfeiture of restricted common stock
From March 31, 2022 to June 30, 2022
Forfeiture of restricted common stock
Repurchase of treasury stock
From December 31, 2021 to March 31, 2022
Forfeiture of restricted common stock
From December 31, 2020 to December 31, 2021
Issuance of restricted common stock
Forfeiture of restricted common stock
From June 30, 2021 to September 30, 2021
Forfeiture of restricted common stock
from March 31, 2021 to June 30, 2021
Foreign currency translation adjustment, net of taxes of ($333)
Stock-based compensation expense
Change in unfunded SERP liability, net of taxes of ($28)
From December 31, 2020 to March 31, 2021
Forfeiture of restricted common stock
From December 31, 2019 to December 31, 2020
Forfeiture of restricted common stock
Issuance of restricted common stock
From June 30, 2020 to September 30, 2020
Forfeiture of restricted common stock
From March 31, 2020 to June 30, 2020
Forfeiture of restricted common stock
From December 31, 2019 to March 31, 2020
Forfeiture of restricted common stock
From December 31, 2018 to December 31, 2019
Repurchase of Class A common stock
Forfeiture of restricted common stock
Issuance of stock awards
from June 30, 2019 to September 30, 2019
Repurchase of Class A common stock
Forfeiture of restricted common stock
From March 31, 2019 to June 30, 2019
Net earnings
Class A Common Stock, $0.06/share
Class B Common Stock, $0.07/share
Foreign currency translation adjustment, net of taxes of $16
Stock-based compensation expense
Change in unfunded SERP liability, net of taxes of ($11)
from December 31, 2018 to March 31, 2019
Forfeiture of restricted common stock
from December 31, 2017 to December 31, 2018
Issuance of restricted common stock
Forfeiture of restricted common stock
from December 31, 2016 to December 31, 2017
Issuance of restricted common stock
Forfeiture of restricted common stock
From December 31, 2015 to December 31, 2016
Issuance of restricted common stock
Forfeiture of restricted common stock
from December 31, 2014 to December 31, 2015
Issuance of restricted common stock
Forfeiture of restricted common stock
from December 31, 2013 to December 31, 2014
Issuance of restricted common stock
Forfeiture of restricted common stock
from December 31, 2012 to December 31, 2013
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase/retirement of Class B common stock
from December 31, 2011 to December 31, 2012
Issuance of restricted common stock
Forfeiture of restricted common stock
Repurchase/retirement of Class B common stock
from December 31, 2010 to December 31, 2011
Issuance of restricted common stock
Termination of restricted common stock
From Jan 1 2011 to Sep 30 2011
Issuance of restricted common stock
Termination of restricted common stock
From Jan 1 2011 to Jun 30 2011
Issuance of restricted common stock
Termination of restricted common stock
Termination of restricted common stock
from December 31, 2009 to December 31, 2010
Issuance of restricted common stock
from January 1, 2010 to September 30, 2010
Issuance of restricted common stock
from January 1, 2010 to June 30, 2010
Issuance of restricted common stock
from December 31, 2008 to December 31, 2009
Repurchase/retirement of Class A common stock
Issuance of restricted common stock
Termination of restricted common stock
Return of unauthorized shares of common stock
from December 31, 2007 to December 31, 2008
Repurchase/retirement of Class A common stock
Exercise of stock options
Issuance of restricted common stock
Termination of restricted common stock
from December 31, 2006 to December 31, 2007
Repurchase/retirement of Class A common stock
Exercise of stock options
Issuance of restricted common stock
Termination of restricted common stock
from December 31, 2005 to December 31, 2006
Exercise of stock options
Issuance of restricted common stock
from December 31, 2004 to December 31, 2005
Exercise of stock options
Issuance of restricted common stock
from December 31, 2003 to December 31, 2004
Exercise of stock options
from December 31, 2002 to December 31, 2003
Exercise of stock options
from December 31, 2001 to December 31, 2002
Exercise of stock options
from December 31, 2000 to December 31, 2001
Exercise of stock options
from December 31, 1999 to December 31, 2000
Exercise of stock options
Purchase and retirement of common stock
from December 31, 1998 to December 31, 1999
Exercise of stock options
On November 5, 1999 the Board of Directors declared a two for one stock split to be paid in the form of a special dividend of one share of Class B common stock for each share of Class A and Class B outstanding. The special stock dividend was payable on December 1, 1999 to all Class A and Class B shareholders of record on November 22, 1999.
from December 31, 1997 to December 31, 1998
Exercise of stock options
Effect of splitting Common Stock into A and B shares
from December 31, 1996 to December 31, 1997
Exercise of stock options
from December 31, 1995 to December 31, 1996
Exercise of stock options
from December 31, 1994 to December 31, 1995
Exercise of stock options
from December 31, 1993 to December 31, 1994
Exercise of stock options
from December 31, 1992 to December 31, 1993
Exercise of stock options