Predicting the Population Growth and Structure of China Based on Grey Fractional-Order Models

Table 4

Prediction of the age structure of the population.

	Year	Proportion of aged 0–14 (unit: %)	Proportion of aged 15–64 (unit: %)	Proportion of aged over 65 (unit: %)	Dependency ratio (unit: %)
The fitting samples area	2015	16.50	73.00	10.50	0.37
	2016	16.69	72.47	10.80	0.38
	2017	16.80	71.84	11.35	0.39
	2018	16.83	71.21	11.96	0.40
	2019	16.81	70.58	12.60	0.42
Short-term forecast area	2020	16.77	69.96	13.25	0.43
	2021	16.72	69.35	13.91	0.44
	2022	16.67	68.74	14.57	0.45
	2023	16.62	68.14	15.23	0.47
	2024	16.57	67.54	15.89	0.48
	2025	16.53	66.95	16.55	0.49
Medium- to long-term forecast area	2030	16.34	63.91	19.49	0.56
	2035	16.21	60.87	21.76	0.62
	2040	16.11	57.86	23.31	0.68
	2045	16.03	54.87	24.28	0.73
	2050	15.96	51.94	24.83	0.79