Table 2. The process of calculating age- and gender- standardized acceptance rate of a COVID-19 vaccine booster.

Age (year)	Gender	Observed acceptance rates (%)	Population according to census 2016	Expected number
Note: The age- and gender- standardized acceptance rate of a COVID-19 vaccine booster equals 75.8%. Abbreviation: COVID-19=coronavirus disease 2019.
18–24	Female	71.0	83,878,762	59,553,921
	Male	77.0	85,832,496	66,091,022
25–34	Female	69.0	97,793,195	67,477,305
	Male	76.4	100,358,860	76,674,169
35–44	Female	73.1	118,780,141	86,828,283
	Male	80.5	123,999,782	99,819,825
45–54	Female	78.3	90,208,072	70,632,920
	Male	86.2	94,139,652	81,148,380
55–64	Female	67.7	69,062,392	46,755,239
	Male	81.8	70,917,364	58,010,404
≥65	Female	60.6	49,507,029	30,001,260
	Male	82.6	48,430,783	40,003,827
Total		75.2	1,032,908,528	782,996,554