Table 2.

Spatial autocorrelation test——Global Moran's I.

Year	Moran’ s I	Z	P
2010	0.308	2.667	0.008
2011	0.362	3.100	0.002
2012	0.372	3.189	0.001
2013	0.425	3.645	0.000
2014	0.420	3.586	0.000
2015	0.383	3.289	0.001
2016	0.367	3.156	0.002
2017	0.365	3.158	0.002
2018	0.280	2.479	0.013
2019	0.261	2.316	0.021
2020	0.325	2.844	0.004