Year | Increase of urban land (km2) | Increase of urban land (%) | Annual urban land growth rate (km2/year) | Annual urban land expansion rate (%) |
1978 | 53.3 | 77.9 | 3.3 | 4.9 |
1992 | 46.6 | 38.3 | 3.3 | 2.7 |
1999 | 81.7 | 48.5 | 11.7 | 6.9 |
2008 | 307.9 | 123.1 | 34.2 | 13.7 |