| 月份 | 同比增长 | 累计增长 |
| 2011-03 | 14.80% | 14.10% |
| 2011-02 | 14.90% | 14.20% |
| 2010-12 | 13.50% | 14.20% |
| 2010-11 | 13.30% | 14.30% |
| 2010-10 | 13.10% | 14.30% |
| 2010-09 | 13.30% | 14.00% |
| 2010-08 | 13.90% | 14.20% |
| 2010-07 | 13.40% | 14.40% |
| 2010-06 | 13.70% | 14.10% |
| 2010-05 | 16.50% | 15.70% |
| 2010-04 | 17.80% | 15.80% |
| 2010-03 | 18.10% | 16.10% |
| 2010-02 | 12.80% | 16.30% |
| 2009-12 | 18.50% | 16.60% |
| 2009-11 | 19.20% | 17.00% |
| 2009-10 | 16.10% | 17.60% |
| 2009-09 | 13.90% | 18.50% |
| 2009-08 | 12.30% | 11.00% |
| 2009-07 | 10.80% | 10.30% |
| 2009-06 | 10.70% | 9.40% |
| 2009-05 | 8.90% | 8.70% |
| 2009-04 | 7.30% | 8.10% |
| 2009-03 | 8.30% | 7.50% |
| 2009-02 | 11.00% | 7.00% |
| 2008-12 | 5.70% | 6.30% |
| 2008-11 | 5.40% | 5.50% |
| 2008-10 | 8.20% | 5.10% |
| 2008-09 | 11.40% | 3.80% |
| 2008-08 | 12.80% | 12.90% |
| 2008-07 | 14.70% | 13.70% |