Table 2.

The urbanization index of BTH.

Levels	2000	2005	2010	2015	2020	2000–2020 (%)
Non agricultural population proportion (NAP)	0.30	0.35	0.42	0.47	0.55	83
GDP (yuan/km2)	344.44	728.82	1306.84	3193.92	3924.84	1041
Non agricultural land proportion (NAL)	0.37	0.41	0.39	0.46	0.54	46