Year	male births per female births
1960	1.0556925718740349
1961	1.055779942210543
1962	1.0551352772130904
1963	1.0558128110115574
1964	1.0551544471223069
1965	1.0553174145447701
1966	1.055867532997381
1967	1.054727988903453
1968	1.056669692136325
1969	1.057087657511081
1970	1.0575123738978611
1971	1.0569856798790036
1972	1.056962489236197
1973	1.0568310278798105
1974	1.0571795426253636
1975	1.0574454495554504
1976	1.0570257518941066
1977	1.0564724490650546
1978	1.0562151701516096
1979	1.0561268864586615
1980	1.0554139317461102
1981	1.056068316736075
1982	1.0556448229546538
1983	1.055810050616388
1984	1.0554588346573506
1985	1.0557694511742253
1986	1.0560348787927587
1987	1.0566104497537783
1988	1.0569112232628106
1989	1.0571669670261716
1990	1.0584891249304262
1991	1.0576391657204187
1992	1.0590786914326316
1993	1.0593351024089013
1994	1.0589122487209268
1995	1.0576988999205836
1996	1.0574841356763565
1997	1.056182092617539
1998	1.0560816923155905
1999	1.0569682518064114
2000	1.057009955136001
2001	1.055033408293072
2002	1.0557753793608475
2003	1.0554333931478357
2004	1.0552574056922712
2005	1.0547160455609181
2006	1.0545442179878675
2007	1.0538298853513022
2008	1.0535041280385606
2009	1.053779972639872
2010	1.0540365744534912
2011	1.0539880581238887
2012	1.0537702447136952
2013	1.0533800871137504
2014	1.053696480110008
2015	1.0536494678720714
2016	1.052762482180658
2017	1.0533429062905164
2018	1.0524226839282806
2019	1.0524224424605464
2020	1.0525264258659657
2021	1.0527093178818299
2022	1.052796359757614