From: Prediction of population aging trend and analysis of influencing factors based on grey fractional-order and grey relational models: a case study of Jiangsu Province, China
Year
2016
2017
2018
2019
2020
2021
2022
2023
Nanjing
1.38
1.39
1.41
1.42
1.43
Suzhou
1.27
1.29
1.30
1.34
1.35
Nantong
1.07
1.10
1.12
1.14
1.15
1.17
1.19
Xuzhou
1.00
1.02
1.03
1.05
1.08
1.09
1.11