Table 2.

Prevalence rates of total birth defects in Liuzhou from 2011 to 2015

Year	Perinatal infants	birth defects	Prevalence of birth defects per 1000 Perinatal Infants (95% CI)	Fixed base growth rate (%)
2011	36,344	863	23.75(22.20–25.37)	–
2012	58,744	1084	18.45(17.38–19.58)	22.31
2013	54,474	1571	28.84(27.44–30.29)	21.43
2014	55,925	1595	28.52(27.15–29.95)	20.08
2015	55,235	1468	26.58(25.24–27.96)	11.92
total	260,722	6581	25.24(24.64–25.86)	–

CI confidence interval