Complexity Analysis of a Four-Dimensional Energy-Economy-Environment Dynamic System

Table 2

Statistics on energy reduction, energy consumption, GDP, and environment in China.

Year	x	y	z
2000	1.9626	1.0455	1.1085	0.9837
2001	3.6786	1.1066	1.2228	0.9595
2002	2.2791	1.2064	1.3482	0.9347
2003	1.2699	1.4020	1.5283	0.8747
2004	2.3033	1.6382	1.8062	0.7741
2005	1.9352	1.8594	2.0813	0.7242
2006	2.0778	2.0380	2.4509	0.6403
2007	3.9437	2.2156	3.0307	0.5455
2008	6.5583	2.2808	3.5976	0.4752
2009	3.2830	2.3912	3.8997	0.4061
2010	3.3307	2.5656	4.6020	0.3693
2011	3.6871	2.7534	5.4243	0.3565
2012	4.0130	2.8608	6.0326	0.3210
2013	3.9274	2.9659	6.6068	0.2817
2014	4.2167	3.0292	7.2151	0.2575
2015	4.2893	3.0583	7.6813	0.2322
2016	4.5925	3.1004	8.2872	0.2159
2017	4.6121	3.1942	9.2297	0.2147