Table 1. Changes in the efficiency of energy consumption stages by provinces in YRD, 2011–2020.

Province	Mean	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Shanghai	0.7218	1.0000	0.6292	0.3297	0.5613	0.3835	1.0000	1.0000	0.9718	0.6642	0.6779
Anhui	0.7614	0.6744	0.7073	0.6683	0.6786	0.7014	0.8230	0.8740	0.9003	0.7754	0.8108
Jiangsu	0.8352	0.7072	0.6957	0.8201	0.7340	0.7533	0.8827	0.9593	0.9743	0.9093	0.9166
Zhejiang	0.5695	0.5176	0.4611	0.5599	0.4782	0.4480	0.6403	0.7187	0.7324	0.5719	0.5668