| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | |
| Beijing | 14.5801 | 15.9746 | 15.7489 | 15.9534 | 17.5649 | 17.4768 | 17.7494 | 18.1019 |
| Tianjin | 8.3453 | 8.1301 | 8.1665 | 8.4195 | 8.8837 | 8.5743 | 9.0753 | 9.4544 |
| Hebei | 4.5439 | 4.6771 | 4.8698 | 5.2664 | 5.5006 | 5.8724 | 6.0643 | 6.3426 |
| Shanxi | 7.1459 | 7.7438 | 7.9082 | 7.5288 | 7.7675 | 8.6290 | 8.9765 | 8.8888 |
| Neimenggu | 5.4165 | 5.4666 | 5.9221 | 6.4497 | 6.8642 | 7.0518 | 7.1835 | 7.0403 |
| Liaoning | 7.3061 | 7.4412 | 7.7829 | 8.2171 | 8.8850 | 9.3260 | 9.2662 | 8.1413 |
| Jilin | 4.4920 | 4.8407 | 4.9612 | 5.0684 | 5.9060 | 6.3703 | 6.5643 | 6.4072 |
| Heilongjiang | 4.7152 | 5.0540 | 5.1742 | 5.3717 | 5.8961 | 6.1191 | 6.3149 | 6.4989 |
| Shanghai | 15.8114 | 15.8028 | 15.7409 | 15.7742 | 16.5283 | 16.9797 | 17.4037 | 17.9018 |
| Jiangsu | 7.2824 | 7.3550 | 7.7045 | 7.9966 | 8.3987 | 8.8471 | 9.0698 | 9.2275 |
| Zhejiang | 8.1869 | 8.3498 | 8.6289 | 8.8916 | 9.1340 | 9.3112 | 9.3908 | 9.5934 |
| Anhui | 5.4596 | 5.9642 | 6.2539 | 7.0113 | 7.2435 | 7.5824 | 7.9057 | 8.1181 |
| Fujian | 6.4229 | 6.5088 | 6.3592 | 6.5555 | 7.1429 | 7.3107 | 7.8802 | 7.8723 |
| Jiangxi | 4.8594 | 5.1350 | 5.6174 | 6.1908 | 6.6402 | 7.5534 | 8.1799 | 8.7888 |
| Shandong | 5.0757 | 4.9575 | 5.0753 | 5.4887 | 5.7386 | 6.0988 | 6.3977 | 6.6734 |
| Henan | 4.1633 | 4.1195 | 4.2170 | 4.4021 | 4.6901 | 4.9649 | 5.4819 | 5.5855 |
| Hubei | 4.6498 | 4.7419 | 4.7531 | 4.8721 | 5.4355 | 5.9524 | 6.4733 | 6.8414 |
| Hunan | 4.3504 | 4.2087 | 4.3513 | 4.5569 | 4.6539 | 5.0137 | 5.2764 | 5.3205 |
| Guangdong | 7.6013 | 7.7855 | 7.9291 | 8.2661 | 8.5485 | 8.8909 | 9.2324 | 9.6011 |
| Guangxi | 4.8542 | 4.9351 | 5.3831 | 5.5787 | 5.5013 | 5.8493 | 6.0605 | 6.2405 |
| Hainan | 7.0158 | 8.0196 | 9.1427 | 11.4846 | 11.7214 | 12.2849 | 12.9543 | 13.7272 |
| Chongqing | 6.2971 | 6.2187 | 6.6710 | 7.8425 | 8.8007 | 8.5031 | 8.7037 | 8.9874 |
| Sichuan | 5.9546 | 5.8095 | 6.2657 | 6.8696 | 7.3118 | 7.6532 | 7.9702 | 8.1035 |
| Guizhou | 7.3454 | 7.3226 | 7.9667 | 8.5953 | 9.0872 | 9.9480 | 10.3831 | 11.0798 |
| Hainan | 7.9338 | 8.4747 | 8.8838 | 9.7196 | 9.9172 | 10.3196 | 10.2741 | 9.6236 |
| Xizang | 3.4180 | 3.8470 | 4.1939 | 4.9817 | 7.5648 | 9.9953 | 8.7707 | 9.3242 |
| Shanxi | 6.1748 | 6.2287 | 6.5216 | 7.0190 | 7.4634 | 7.8288 | 7.7520 | 7.5505 |
| Gansu | 5.2534 | 5.1408 | 5.1967 | 5.3459 | 5.6578 | 6.1552 | 6.5985 | 7.1709 |
| Qinghai | 5.4292 | 5.4878 | 6.4896 | 6.5861 | 7.1748 | 7.7469 | 8.2491 | 8.6566 |
| Ningxia | 6.3964 | 6.4572 | 6.7050 | 7.5039 | 8.4259 | 8.8421 | 9.2137 | 9.0960 |
| Xinjiang | 6.2628 | 6.8500 | 7.0406 | 7.6548 | 8.9774 | 9.3125 | 9.7863 | 9.5734 |
| The maximum | 15.8114 | 15.9746 | 15.7489 | 15.9534 | 17.5649 | 17.4768 | 17.7494 | 18.1019 |
| Minimum value | 3.4180 | 3.8470 | 4.1939 | 4.4021 | 4.6539 | 4.9649 | 5.2764 | 5.3205 |
| Mean | 6.5401 | 6.7435 | 7.0202 | 7.4665 | 8.0331 | 8.4634 | 8.7291 | 8.8882 |
| Standard deviation | 2.6093 | 2.7424 | 2.6843 | 2.7291 | 2.8666 | 2.8418 | 2.8417 | 2.9301 |
| Coefficient of variation | 0.3990 | 0.4067 | 0.3824 | 0.3655 | 0.3569 | 0.3358 | 0.3255 | 0.3297 |