|
| 2000 | 2005 | 2010 | 2015 | 2018 | |||||
| Land area (km2) | Proportion | Land area (km2) | Proportion | Land area (km2) | Proportion | Land area (km2) | Proportion | Land area (km2) | Proportion | |
| Agricultural space | 26,421.20 | 64.11% | 26,029.62 | 63.16% | 25,881.07 | 62.80% | 25,538.35 | 61.97% | 25,495.72 | 61.86% |
| Ecological space | 11,908.10 | 28.89% | 12,265.83 | 29.76% | 12,318.72 | 29.89% | 12,331.16 | 29.92% | 12,322.55 | 29.90% |
| Urban space | 2883.73 | 7.00% | 2917.58 | 7.08% | 3013.24 | 7.31% | 3343.52 | 8.11% | 3394.77 | 8.24% |
| Total | 41,213.03 | 100.00% | 41,213.03 | 100.00% | 41,213.03 | 100.00% | 41,213.03 | 100.00% | 41,213.03 | 100.00% |