Table 6. The percentage of internal and external elements changes in the Dongying-Binzhou urban area from 2000 to 2016.

year		2000	2002	2004	2006	2008	2010	2012	2014	2016
Emergy percentage of internal elements (%)	Dongying	7.27	11.97	26.63	34.28	31.55	43.32	45.78	40.83	46.27
	Binzhou	29.77	41.95	49.80	47.33	53.31	59.41	58.26	59.90	67.16
	Dongying-Binzhou urban area	15.09	23.80	38.78	41.33	41.83	50.03	50.55	47.95	57.61
Emergy percentage of external elements (%)	Dongying	92.73	88.03	73.37	65.72	68.45	56.68	54.22	59.17	53.73
	Binzhou	70.23	58.05	50.20	52.67	46.69	40.59	41.74	40.10	32.84
	Dongying-Binzhou urban area	84.91	76.20	61.22	58.67	58.17	49.97	49.45	52.05	42.39