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

Table 1

Demographic indicators statistics.

Population indicators		2015	2016	2017	2018	2019
Population size and composition (unit: people)	Gross population	13.7462	13.8271	13.9008	13.9538	14.0005
	Male population	7.0414	7.0815	7.1137	7.1351	7.1527
	Female population	6.7048	6.7456	6.7871	6.8187	6.8478
Birth rate, death rate, and natural growth rate (unit: ‰)	Birth rate	12.07	12.95	12.43	10.94	10.48
	Death rate	7.11	7.09	7.11	7.13	7.14
	Natural growth rate	4.96	5.86	5.32	3.81	3.34
Population age structure (unit: ‰)	Proportion of aged 0–14	16.5	16.7	16.8	16.9	16.8
	Proportion of aged 15–64	73.0	72.5	71.8	71.2	70.6
	Proportion of age over 65	10.5	10.8	11.4	11.9	12.6