Table 1.

Population structure by sex and year in Huai’an District during 1990-2016.

Year	Male	Female	Total	Sex Ratio
1990	579,661	553,055	1,132,716	1.05
1991	590,343	553,732	1,144,075	1.07
1992	592,773	552,463	1,145,236	1.07
1993	599,001	555,371	1,154,372	1.08
1994	602,679	556,577	1,159,256	1.08
1995	569,772	522,357	1,092,129	1.09
1996	608,500	580,673	1,189,173	1.05
1997	624,202	582,958	1,207,160	1.07
1998	629,326	584,199	1,213,525	1.08
1999	630,129	585,494	1,215,623	1.08
2000	619,541	581,138	1,200,679	1.07
2001	637,159	595,108	1,232,267	1.07
2002	619,232	580,560	1,199,792	1.07
2003	622,392	583,717	1,206,109	1.07
2004	616,679	578,174	1,194,853	1.07
2005	617,697	576,883	1,194,580	1.07
2006	624,640	586,446	1,211,086	1.07
2007	622,836	584,940	1,207,776	1.06
2008	612,067	575,363	1,187,430	1.06
2009	609,088	565,789	1,174,877	1.08
2010	615,163	567,366	1,182,529	1.08
2011	613,924	565,755	1,179,679	1.09
2012	609,496	568,177	1,177,673	1.07
2013	618,570	568,841	1,187,411	1.09
2014	624,736	576,106	1,200,842	1.08
2015	618,482	572,353	1,190,835	1.08
2016	616,484	570,536	1,187,020	1.08