Year	% female
1970	47.89036
1971	48.55476
1972	49.00553
1973	49.0168
1974	49.41871
1975	50.62288
1976	50.63358
1977	49.98407
1978	50.16631
1979	50.64619
1980	50.56922
1981	50.80649
1982	50.77505
1983	50.87922
1984	50.81271
1985	50.32538
1986	50.92983
1987	50.93772
1988	50.99147
1989	51.05974
1990	51.20762
1991	51.36988
1992	51.26018
1993	51.27559
1994	51.27433
1995	51.26998
1996	51.04225
1997	51.05767
1998	51.04589
1999	51.03544
2000	51.00988
2001	51.02612
2002	51.03779
2003	51.22677
2004	51.13983
2005	51.19728
2006	51.30059
2007	51.33475
2008	51.33813
2009	51.2619
2010	51.12304
2011	51.01918
2012	50.8698
2013	50.6255
2014	50.49931
2015	50.41137
2016	50.28362
2017	50.15203
2018	50.1499