Year	male births per female births
1960	1.048865705458423
1961	1.0487752225939793
1962	1.049164761894582
1963	1.0491993842816045
1964	1.0492367747530682
1965	1.049097255191095
1966	1.0491262432675024
1967	1.0492759464678967
1968	1.0487269413272142
1969	1.0486154558417375
1970	1.048520226340728
1971	1.0484353082556257
1972	1.0481823173829545
1973	1.0477272560065982
1974	1.0472601543356557
1975	1.047474085886907
1976	1.0472739664567114
1977	1.0475505623350523
1978	1.0475443256292094
1979	1.0480225063695352
1980	1.0482030062949867
1981	1.0485405435119641
1982	1.0487285267857613
1983	1.0488332938598575
1984	1.0489567839842593
1985	1.0490923195968098
1986	1.049516532252422
1987	1.0499642723806861
1988	1.0498689853222112
1989	1.05011109536352
1990	1.0502115113568482
1991	1.049996773640138
1992	1.0499222060804538
1993	1.049710299780279
1994	1.0497856387276567
1995	1.0502595916941468
1996	1.0504358068239692
1997	1.0506850589202474
1998	1.0507574909093451
1999	1.0505113443695484
2000	1.0507363348396332
2001	1.0506256323556031
2002	1.050279397326961
2003	1.0501468740389384
2004	1.0500799986325202
2005	1.0503849660823705
2006	1.0508206455447862
2007	1.0506952555387439
2008	1.0507522109049015
2009	1.0506179745376512
2010	1.0506676694705521
2011	1.0507359568963852
2012	1.0507688935005364
2013	1.0509744153703042
2014	1.0510085392654522
2015	1.0512015055224682
2016	1.0517124056598823
2017	1.0514488766902361
2018	1.0512951771039136
2019	1.0509148611290033
2020	1.0507672308301688
2021	1.0507153253101849
2022	1.0505870227782803