Year	male births per female births
1960	1.034757833683874
1961	1.0347402191316024
1962	1.034949413383225
1963	1.0355066654411353
1964	1.0356063746361879
1965	1.0358017560784154
1966	1.0356868918298778
1967	1.0360523854806418
1968	1.03582139797553
1969	1.0352745260589316
1970	1.035232481556007
1971	1.0347514092856878
1972	1.0341078678534623
1973	1.0334011400974172
1974	1.0328402534376777
1975	1.0322610982351714
1976	1.0322448114003009
1977	1.0331340444869652
1978	1.0335923903389348
1979	1.0340246867095786
1980	1.0340825472997979
1981	1.0343401727116917
1982	1.034298218620112
1983	1.0345751762282955
1984	1.0347132819875706
1985	1.0349544403347783
1986	1.0351866720528817
1987	1.0353019806802655
1988	1.03530604386388
1989	1.0355332981104355
1990	1.0356392645158823
1991	1.0360349216545157
1992	1.036340971478419
1993	1.03648219069304
1994	1.0369278358762863
1995	1.0373738070454381
1996	1.03729276698272
1997	1.0369774992823322
1998	1.0367585587040944
1999	1.0366358027905127
2000	1.0371608917552815
2001	1.0376632747490813
2002	1.037768147274492
2003	1.0377423303249744
2004	1.0377166694037676
2005	1.0379436166310565
2006	1.03818640292625
2007	1.0384146815160247
2008	1.0386035593148522
2009	1.038351187813524
2010	1.0389454588671625
2011	1.038885839103828
2012	1.0386376269551427
2013	1.0385551704343108
2014	1.038525092945246
2015	1.0387397353020764
2016	1.0394156540655672
2017	1.039707749103858
2018	1.039447771432135
2019	1.0390157460218505
2020	1.0387279406285281
2021	1.038559694239269
2022	1.0384988000422828