Year	male births per female births
1960	1.0518660524934484
1961	1.052271396712944
1962	1.0523965727553968
1963	1.0526165397127802
1964	1.0526185551103548
1965	1.0526642851684416
1966	1.053071794562212
1967	1.053017527079489
1968	1.0536672875840285
1969	1.0539591120929022
1970	1.0539905002358307
1971	1.054319039491498
1972	1.0544462687944005
1973	1.054492443311127
1974	1.0543927404512756
1975	1.0544306929333798
1976	1.054321225834342
1977	1.0543481518774476
1978	1.0534989416763025
1979	1.053051532825571
1980	1.0528542237578369
1981	1.0522456413980255
1982	1.0521017939149608
1983	1.051721278481069
1984	1.0516098940598846
1985	1.0499539022516433
1986	1.0496913917710349
1987	1.050051192211574
1988	1.051471613638567
1989	1.052141279401867
1990	1.0530367370744111
1991	1.0540278018162037
1992	1.0545281932563806
1993	1.0548374367850808
1994	1.054227737415504
1995	1.0541990417037528
1996	1.0535391943012582
1997	1.0531914467764505
1998	1.0529739439490617
1999	1.0530266645726627
2000	1.0531379105091732
2001	1.052359948140607
2002	1.0512641219656547
2003	1.0497990551952525
2004	1.0496949348836906
2005	1.0502868254984383
2006	1.0507623243460529
2007	1.0510948828953526
2008	1.0514020345392088
2009	1.0517168743081633
2010	1.0513392298432624
2011	1.0510079112639048
2012	1.0501040576082235
2013	1.0497907690742592
2014	1.0498326095705788
2015	1.0496136064500283
2016	1.0492359759862677
2017	1.0493854143959418
2018	1.049627145244073
2019	1.050001078778142
2020	1.050027007017855
2021	1.0501322058992497
2022	1.0501095100069833