Table 2. Descriptive statistics of variables.

Variables	Symbols	Unit	Observations(1980–2021)	Minimum value	Maximum value	Average value	Standard deviation
Birth rate	FET	%	42	0.75	2.33	1.56	0.42
Disposable income per capita	PCDI	hundred dollars	42	2.47	351.28	88.63	103.25
Fertility intention	BP	-	42	0	1	0.42	0.47
Marriage rate	MR	%	42	0.56	1.04	0.78	0.12
Education level	EL	%	42	0.11	3.25	1.24	1.04
Female Employment Rate	FER	%	42	14.28	56.1	32.45	12.99