Research on the Relationship between Beijing-Tianjin-Hebei Airport Group and Regional Coordinated Development

Table 6

Comprehensive scores of Jing-Jin-Ji Airport Group subsystem and regional subsystem.

Year	Comprehensive score of airport group subsystem i	Comprehensive score of regional subsystem j
2009	−1.54	−1.46
2010	−1.02	−0.91
2011	−0.76	−0.44
2012	−0.38	−0.13
2013	−0.11	−0.04
2014	0.07	0.19
2015	0.26	0.27
2016	0.63	0.53
2017	1.25	1.01
2018	1.59	1.02