Table 7.

Results of Grey correlation (2003–2016).

Variable	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016
x1	1	0.9397	0.9496	0.8237	0.6465	0.5537	0.6934	0.6618	0.7564	0.7913	0.7614	0.7412	0.9248	0.6295
x2	1	0.9917	0.7503	0.5580	0.6361	0.5059	0.5007	0.4955	0.4473	0.5531	0.5210	0.5320	0.5223	0.3824
x3	1	0.9078	0.8516	0.7814	0.5278	0.4502	0.4132	0.3719	0.3333	0.3539	0.8020	0.8029	0.3970	0.3567
x4	1	0.7139	0.6876	0.8964	0.9595	0.6040	0.5950	0.5811	0.5184	0.5380	0.8009	0.7674	0.6977	0.7962
x5	1	0.8153	0.5361	0.7336	0.8524	0.7579	0.9131	0.6648	0.4865	0.4879	0.4647	0.4302	0.5927	0.4215
x6	1	0.7966	0.7572	0.7725	0.5036	0.4854	0.3944	0.5076	0.7894	0.7132	0.4640	0.4646	0.6732	0.4599
x7	1	0.9913	0.7532	0.7886	0.7466	0.6725	0.6836	0.6889	0.7880	0.8169	0.7930	0.7862	0.9508	0.6777