Table 1.

Theil index measurement and contribution rate of URI in the YRB from 2011 to 2018.

Year	Comprehensive Difference	Intraregional Difference					Interregional Difference
		Upstream	Midstream	Downstream	Contribution Value	Contribution Rate	Contribution Value	Contribution Rate
2011	0.0877	0.1131	0.0676	0.0791	0.0830	94.69%	0.0047	5.31%
2012	0.0842	0.0861	0.0985	0.0723	0.0836	99.30%	0.0006	0.70%
2013	0.0913	0.0983	0.1141	0.0683	0.0890	97.50%	0.0023	2.50%
2014	0.0788	0.0896	0.0614	0.0780	0.0754	95.63%	0.0034	4.37%
2015	0.0773	0.0911	0.0689	0.0688	0.0735	95.13%	0.0038	4.87%
2016	0.0735	0.0692	0.0601	0.0745	0.0690	93.83%	0.0045	6.17%
2017	0.0788	0.0890	0.0595	0.0738	0.0730	92.57%	0.0059	7.43%
2018	0.0700	0.0745	0.0532	0.0660	0.0641	91.55%	0.0059	8.45%
Mean	0.0802	0.0889	0.0729	0.0726	0.0763	95.02%	0.0039	4.98%