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	1.035
1971	1.035
1972	1.035
1973	1.035
1974	1.035
1975	1.035
1976	1.035
1977	1.035
1978	1.035
1979	1.036
1980	1.036
1981	1.036
1982	1.037
1983	1.037
1984	1.037
1985	1.037
1986	1.037
1987	1.037
1988	1.036
1989	1.035
1990	1.034
1991	1.033
1992	1.032
1993	1.032
1994	1.032
1995	1.032
1996	1.032
1997	1.032
1998	1.032
1999	1.032
2000	1.032
2001	1.032
2002	1.032
2003	1.033
2004	1.033
2005	1.033
2006	1.033
2007	1.033
2008	1.034
2009	1.034
2010	1.034
2011	1.035
2012	1.035
2013	1.035
2014	1.035
2015	1.035
2016	1.035
2017	1.035
2018	1.035
2019	1.035
2020	1.035
2021	1.035
2022	1.035