Year	D₂(x)	Z₂(y)	C	D	Type	Coupling phase
2006	0.2938	0.0100	0.3568	0.2536	moderate inharmonious recession	low level coupling
2007	0.3831	0.0475	0.6265	0.3949	moderate inharmonious recession	moderate coupling
2008	0.2803	0.2923	0.9998	0.5339	near-coordinated development	moderate coupling
2009	0.3435	0.3846	0.9984	0.5995	near-coordinated development	moderate coupling
2010	0.3737	0.3965	0.9996	0.6186	primary coordinated development	benign coupling
2011	0.3406	0.4463	0.9909	0.6159	primary coordinated development	benign coupling
2012	0.4056	0.5333	0.9907	0.6726	primary coordinated development	benign coupling
2013	0.4272	0.6422	0.9796	0.7090	moderate coordinated development	benign coupling
2014	0.5273	0.6917	0.9909	0.7666	moderate coordinated development	benign coupling
2015	1.0000	0.8139	0.9947	0.9595	quality coordinated development	high level coupling
2016	0.8481	0.8932	0.9997	0.9305	quality coordinated development	high level coupling
2017	0.3408	0.9977	0.3408	0.5831	near-coordinated development	moderate coupling