| Region | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | Average value |
| Beijing | 1.19 | 1.46 | 2.46 | 1.91 | 1.95 | 2.04 | 1.84 |
| Tianjin | 1.17 | 1.37 | 1.93 | 1.49 | 1.95 | 1.72 | 1.61 |
| Hebei | 0.48 | 0.32 | 0.61 | 0.64 | 0.98 | 0.91 | 0.66 |
| Shanxi | 0.69 | 1.02 | 1.43 | 0.82 | 0.64 | 0.58 | 0.86 |
| Liaoning | 0.92 | 0.59 | 0.61 | 0.70 | 0.63 | 0.76 | 0.70 |
| Jilin | 0.53 | 0.52 | 1.04 | 0.72 | 1.19 | 1.51 | 0.92 |
| Heilongjiang | 0.87 | 0.51 | 0.39 | 0.45 | 0.52 | 0.42 | 0.53 |
| Shanghai | 1.36 | 0.75 | 1.37 | 1.27 | 1.14 | 1.01 | 1.15 |
| Jiangsu | 1.30 | 0.94 | 0.93 | 1.17 | 1.43 | 1.16 | 1.15 |
| Zhejiang | 0.81 | 0.70 | 1.10 | 1.06 | 1.09 | 1.02 | 0.96 |
| Anhui | 0.27 | 0.73 | 0.64 | 0.66 | 1.30 | 1.64 | 0.87 |
| Fujian | 1.00 | 1.33 | 0.89 | 0.82 | 1.12 | 0.85 | 1.00 |
| Jiangxi | 0.26 | 0.34 | 0.59 | 0.52 | 0.79 | 0.91 | 0.57 |
| Shandong | 1.23 | 0.71 | 1.01 | 0.95 | 0.90 | 0.75 | 0.93 |
| He’nan | 0.94 | 0.62 | 0.75 | 0.62 | 0.66 | 1.00 | 0.76 |
| Hubei | 0.30 | 0.32 | 0.83 | 0.89 | 0.81 | 0.86 | 0.67 |
| Hu’nan | 0.69 | 0.61 | 1.25 | 1.03 | 1.08 | 0.82 | 0.92 |
| Guangdong | 1.23 | 0.84 | 2.21 | 2.02 | 1.90 | 2.28 | 1.75 |
| Guangxi | 0.50 | 0.49 | 0.76 | 0.65 | 1.27 | 1.46 | 0.85 |
| Chongqing | 0.64 | 0.76 | 1.27 | 1.46 | 1.15 | 1.19 | 1.08 |
| Sichuan | 1.58 | 0.53 | 0.45 | 0.64 | 1.29 | 1.17 | 0.94 |
| Guizhou | 0.46 | 0.69 | 0.85 | 1.94 | 1.11 | 0.78 | 0.97 |
| Yunnan | 1.49 | 1.58 | 1.84 | 1.24 | 1.05 | 1.82 | 1.50 |
| Shaanxi | 0.22 | 0.39 | 0.48 | 0.48 | 0.48 | 0.54 | 0.43 |
| Gansu | 0.52 | 0.32 | 0.40 | 0.64 | 0.73 | 0.66 | 0.54 |
| Ningxia | 0.61 | 0.54 | 0.78 | 0.64 | 0.59 | 0.61 | 0.63 |