Table 3.

Grey correlation coefficient of panel data.

Year	Nanjing	Changzhou	Wuxi	Suzhou	Shanghai	Hangzhou	Ningbo	Wenzhou	Huzhou
2010	0.9722	0.9336	0.9324	0.9326	1.0000	0.9492	0.9339	0.9322	0.9270
2011	0.9217	0.8957	0.8940	0.8949	1.0000	0.9195	0.8951	0.8931	0.8855
2012	0.9046	0.8728	0.8724	0.8860	1.0000	0.9022	0.8759	0.8696	0.8602
2013	0.9007	0.8643	0.8658	0.8803	1.0000	0.8992	0.8673	0.8592	0.8501
2014	0.9395	0.9148	0.9164	0.9260	1.0000	0.9418	0.9140	0.9133	0.9045
2015	0.8755	0.8295	0.8385	0.8532	1.0000	0.8847	0.8305	0.8364	0.8163
2016	0.8976	0.8618	0.8666	0.8779	1.0000	0.9092	0.8558	0.8702	0.8480
2017	0.8850	0.8389	0.8458	0.8544	1.0000	0.9009	0.8331	0.8503	0.8247
2018	0.8919	0.8402	0.8488	0.8547	1.0000	0.9082	0.8365	0.8549	0.8288
2019	0.8919	0.8366	0.8409	0.8514	1.0000	0.9141	0.8438	0.8422	0.8126