Year	male births per female births
1960	1.0422934926560348
1961	1.04217157453482
1962	1.0421988303100966
1963	1.042447354459817
1964	1.0424362786558028
1965	1.0423367337412255
1966	1.0423748158797685
1967	1.042518681071145
1968	1.0424260405772154
1969	1.042387831921733
1970	1.04241105873921
1971	1.0423876671414172
1972	1.042675791617249
1973	1.0427376089440228
1974	1.0426409870129254
1975	1.0426167552806767
1976	1.0426285838514213
1977	1.042809524592484
1978	1.0430259244028184
1979	1.0430285761977434
1980	1.0428761710832193
1981	1.0419932396352283
1982	1.0413465979546563
1983	1.041538552285785
1984	1.041303735836416
1985	1.0414855917948582
1986	1.0422137669260918
1987	1.0427517319164716
1988	1.042579334807275
1989	1.0421117238417397
1990	1.0418821252986532
1991	1.0416707674654884
1992	1.041129279218271
1993	1.0409078063587318
1994	1.0404374156067426
1995	1.0398528663247781
1996	1.0395020842449971
1997	1.0396499723727974
1998	1.039809703193525
1999	1.039872093914518
2000	1.0394797483985576
2001	1.0391409608290658
2002	1.038959547951002
2003	1.0384894175251551
2004	1.0381067126475874
2005	1.0380950516384
2006	1.0380433037264372
2007	1.0379567267393675
2008	1.0376911625795913
2009	1.0374766052017645
2010	1.0375195226656115
2011	1.037564889623805
2012	1.0379368587289501
2013	1.0381708693174831
2014	1.0384079492875717
2015	1.0384208917562043
2016	1.0385100395156284
2017	1.0384675246315875
2018	1.0385330050444534
2019	1.0385553560639302
2020	1.0383708652116406
2021	1.038320021893796
2022	1.0383311263193276