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

Table 14

Entropy change in Beijing 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	0.177069	−0.153	−0.07341	−0.07142	0.126583
2017	0.195605	0.333152	0.184595	0.194631	−0.02282
2018	−0.08023	−0.32249	−0.27342	−0.19002	0.057868
2019	−0.18698	0.098532	0.062999	−0.02945	−0.06172
2020	−0.07314	−0.02462	−0.00943	−0.09174	0.017547
2021	−0.11984	−0.03264	−0.00788	−0.10156	−0.0022
2022	−0.11656	−0.03691	−0.00677	−0.10324	−0.0022
2023	−0.10928	−0.03857	−0.00594	−0.10077	−0.0022
2024	−0.10029	−0.03856	−0.0053	−0.09595	−0.00219