Grey Relational Entropy Calculation and Fractional Prediction of Water and Economy in the Beijing-Tianjin-Hebei Region

Table 15

Entropy change in Tianjin from 2015 to 2024.

Year	Added value of primary industry	Industrial added value	Added value of construction industry	Added value of tertiary industry	Permanent residents
2015
2016	0.207636	0.310586	0.216517	−0.02057	−0.16706
2017	−0.22433	−0.07587	0.099066	−0.07915	0.231136
2018	−0.04021	0.09878	−0.44248	0.113485	−0.04915
2019	0.077954	−0.33161	0.172697	−0.41481	−0.02747
2020	−0.09862	−0.07456	−0.14452	−0.0488	−0.00537
2021	−0.02349	−0.1383	−0.06556	−0.12694	−0.04316
2022	−0.01983	−0.13337	−0.05468	−0.114	−0.05419
2023	−0.01714	−0.12588	−0.04624	−0.10046	−0.06117
2024	−0.01508	−0.11722	−0.03975	−0.08775	−0.06527