Table 1

Decomposition of SRB change

Year	Difference of SRB	Effect of SRB change by birth order				Effect of compositional change
Year	Difference of SRB	First	Second	Third+	Sum	First	Second	Third+	Sum
2000–2010	1.29	4.51	−5.71	−0.05	−1.25	−8.73	10.28	0.98	2.54
2010–2020	−10.04	−3.50	−8.09	−1.89	−13.49	−23.27	18.53	8.20	3.45

Data source: calculated from 2000 and 2010 census data and 2020 birth registration system (BRS) data.
SRB, sex ratio at birth.