Year	male births per female births
1960	1.035
1961	1.035
1962	1.035
1963	1.035
1964	1.035
1965	1.035
1966	1.035
1967	1.035
1968	1.035
1969	1.035
1970	1.036
1971	1.035
1972	1.035
1973	1.034
1974	1.034
1975	1.034
1976	1.034
1977	1.035
1978	1.035
1979	1.036
1980	1.035
1981	1.033
1982	1.034
1983	1.035
1984	1.036
1985	1.035
1986	1.035
1987	1.035
1988	1.036
1989	1.036
1990	1.036
1991	1.035
1992	1.033
1993	1.03
1994	1.03
1995	1.029
1996	1.031
1997	1.033
1998	1.036
1999	1.037
2000	1.037
2001	1.036
2002	1.035
2003	1.036
2004	1.036
2005	1.036
2006	1.037
2007	1.035
2008	1.033
2009	1.033
2010	1.033
2011	1.034
2012	1.036
2013	1.037
2014	1.038
2015	1.039
2016	1.039
2017	1.038
2018	1.039
2019	1.035
2020	1.035
2021	1.035
2022	1.035