Driven Factors Analysis of China’s Irrigation Water Use Efficiency by Stepwise Regression and Principal Component Analysis

Table 4

Total variance of interpretation.

Components	Initial eigenvalue
	Total	Variance (%)	Cumulative (%)
1	10.511	50.054	50.054
2	5.667	26.985	77.039
3	2.389	11.378	88.417
4	1.039	4.947	93.364
5	0.454	2.160	95.524
6	0.435	2.073	97.597
7	0.225	1.070	98.667
8	0.126	0.600	99.267
9	0.067	0.320	99.588
10	0.038	0.179	99.767
11	0.030	0.142	99.909
12	0.012	0.057	99.965
13	0.007	0.035	100.00