Year	male births per female births
1960	1.033682939246342
1961	1.0337686063834195
1962	1.033721745960361
1963	1.0337581452041607
1964	1.0338023461041752
1965	1.0338217418960813
1966	1.0338056801424937
1967	1.0336970892639885
1968	1.0335936590206463
1969	1.0336314227045131
1970	1.033682932269376
1971	1.0336994054989426
1972	1.0337305484194097
1973	1.0338068976850356
1974	1.0336997940652137
1975	1.0337303803465103
1976	1.0339307524269898
1977	1.0338982854398633
1978	1.0337829255739535
1979	1.0337923659547095
1980	1.0335424818218613
1981	1.0335028190441589
1982	1.033756550063651
1983	1.0337935742200033
1984	1.0338436386393997
1985	1.0340797400847301
1986	1.034184700087445
1987	1.0344602170295956
1988	1.0342203641258938
1989	1.034037404614577
1990	1.0339458768931273
1991	1.0340740527943038
1992	1.0340403880103215
1993	1.0339729779237483
1994	1.0338307857997184
1995	1.0334774884162177
1996	1.0333790229810644
1997	1.0332650740723675
1998	1.0328863769668317
1999	1.03260633666119
2000	1.0320443887709503
2001	1.0313395817921909
2002	1.0310453103358066
2003	1.0307737056627937
2004	1.0308010668443173
2005	1.0312284307869946
2006	1.0310354331348734
2007	1.031040614354392
2008	1.0311368541896182
2009	1.0311679098527773
2010	1.03132760966961
2011	1.0313598531802375
2012	1.0313336330554008
2013	1.03145548922212
2014	1.03150031181654
2015	1.0315092576288751
2016	1.0316845728224817
2017	1.0316929278166338
2018	1.032119544176921
2019	1.032235235332738
2020	1.0322984100138628
2021	1.0322736492259956
2022	1.0323945285850848