Year	% female
1970	41.78919
1971	41.76079
1972	41.74651
1973	41.7444
1974	42.01101
1975	42.2151
1976	42.14642
1977	42.23698
1978	42.65474
1979	43.05748
1980	42.81501
1981	42.55245
1982	42.41334
1983	42.99528
1984	42.68812
1985	42.29139
1986	42.8906
1987	43.24085
1988	43.40972
1989	43.65925
1990	43.76106
1991	43.93972
1992	44.1717
1993	44.3073
1994	44.82145
1995	45.04193
1996	45.24422
1997	45.50377
1998	45.92205
1999	46.2754
2000	46.36727
2001	46.43797
2002	46.62152
2003	47.02091
2004	47.13071
2005	47.27916
2006	47.43087
2007	47.59322
2008	47.70197
2009	48.00301
2010	47.74504
2011	47.80397
2012	47.85744
2013	48.24664
2014	48.29303
2015	48.19379
2016	48.24049
2017	48.11102
2018	48.10305