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

Table 3

Data of remaining 21 variables and IWUC after standardization.

	AP	AT	RF	DI	PR	AA	PA	LW	PW	PWC	PIF	PGDP	RPA	GCA	CP	SST	WSIA	HWSIA	EIA	SA	WP	IWUC
1997	−0.66	−0.96	0.17	0.02	0.85	−2.32	1.24	0.12	0.52	1.76	−0.95	−1.00	2.08	1.79	0.09	−0.04	−1.40	−1.24	−1.51	−0.57	−1.64	0.00
1998	2.18	1.43	−1.55	−2.29	0.83	−2.32	1.05	2.49	2.57	−0.22	−0.89	−0.96	1.35	1.69	0.63	−0.41	−1.23	−1.10	−1.11	−0.10	−1.34	2.28
1999	−0.20	0.39	−0.55	−0.69	0.89	0.25	0.89	0.25	0.47	0.21	−0.85	−0.91	1.35	1.40	0.51	−0.41	−1.04	−0.96	−0.78	−0.43	−1.08	0.00
2000	−0.08	−1.78	−0.28	−0.28	0.87	0.25	0.74	0.06	0.23	−0.65	−0.82	−0.82	0.37	0.18	−0.87	0.02	−0.85	−0.80	−0.53	−0.55	−0.88	0.00
2001	−0.67	−0.84	1.16	0.67	0.87	0.25	0.60	−0.26	−0.12	−0.14	−0.73	−0.72	−0.48	−0.26	−1.15	−0.77	−0.65	−0.64	−0.37	−0.79	−0.23	0.00
2002	0.67	0.46	−1.05	−0.46	0.87	0.25	0.47	0.27	0.29	−0.82	−0.64	−0.62	−0.84	−0.72	−1.02	−0.46	−0.43	−0.47	−0.33	−0.66	−0.58	0.00
2003	0.05	−0.40	1.44	1.43	0.69	0.25	0.35	−0.03	−0.03	−2.20	−0.53	−0.47	−1.82	−1.53	−1.80	−0.83	−0.21	−0.29	−0.46	−1.08	0.10	1.14
2004	−1.01	0.35	0.94	0.78	0.26	0.25	0.24	−1.31	−1.20	−0.91	−0.27	−0.24	−0.48	−1.14	−0.65	−0.99	0.02	−0.09	−0.28	0.08	−0.08	1.14
2005	0.23	−0.66	−0.17	0.25	−0.16	0.25	0.12	0.19	0.05	−0.48	−0.02	−0.01	−0.36	−0.77	−0.21	−1.04	0.27	0.11	−0.07	−0.59	0.60	−1.14
2006	−0.72	1.02	0.72	0.73	−0.59	0.25	0.02	−0.85	−0.89	0.38	0.24	0.29	−0.23	0.01	0.20	−0.83	0.54	0.35	0.20	−0.64	0.98	−1.14
2007	−0.74	1.73	1.27	1.14	−0.95	0.64	−1.30	−0.88	−0.96	0.38	0.69	0.76	−0.11	−0.06	0.31	1.81	0.80	0.66	0.50	0.43	0.42	−1.14
2008	0.53	−0.14	−0.72	−0.63	−1.19	0.67	−1.39	−0.04	−0.29	0.73	1.18	1.22	−0.23	−0.25	1.12	1.28	1.04	0.90	1.24	0.79	1.15	−1.14
2009	−1.28	0.35	0.06	0.49	−1.48	0.67	−1.48	−1.29	−1.39	0.90	1.49	1.46	−0.23	−0.10	1.18	1.33	1.37	1.49	1.54	2.05	1.20	0.00
2010	1.68	−0.96	−1.44	−1.16	−1.76	0.67	−1.56	1.29	0.75	1.07	2.11	2.03	−0.36	−0.23	1.65	1.33	1.76	2.10	1.96	2.05	1.38	0.00