Year	% female
1970	51.84161
1971	51.83175
1972	51.8058
1973	52.06618
1974	51.99308
1975	52.79323
1976	52.64253
1977	51.92444
1978	51.83257
1979	51.86722
1980	52.1993
1981	52.10496
1982	51.94001
1983	51.61872
1984	51.42034
1985	51.41194
1986	51.92457
1987	51.30266
1988	51.39306
1989	51.79228
1990	51.47994
1991	51.27595
1992	51.21791
1993	51.21883
1994	51.13482
1995	51.07201
1996	51.14139
1997	51.20334
1998	51.08676
1999	50.93454
2000	51.0516
2001	50.97768
2002	51.24914
2003	50.9369
2004	50.67392
2005	50.82257
2006	50.85492
2007	50.83395
2008	50.87519
2009	50.41006
2010	51.12852
2011	51.09735
2012	51.07229
2013	51.04038
2014	51.01624
2015	50.84623
2016	50.68381
2017	50.79623
2018	50.60897