Year	% female
1970	43.50129
1971	43.82091
1972	43.89444
1973	44.65073
1974	45.26912
1975	46.06449
1976	46.67242
1977	47.44908
1978	48.12625
1979	48.12665
1980	48.27349
1981	48.57203
1982	48.49192
1983	48.55894
1984	48.53241
1985	48.45018
1986	48.61944
1987	48.69046
1988	48.62871
1989	48.57528
1990	48.56273
1991	48.68169
1992	48.64085
1993	48.58832
1994	48.48161
1995	48.60836
1996	48.57439
1997	48.65372
1998	48.77442
1999	48.69221
2000	48.66484
2001	48.64289
2002	48.48014
2003	48.58945
2004	48.76775
2005	48.83736
2006	48.68146
2007	48.77271
2008	48.77559
2009	48.87425
2010	48.80663
2011	48.73383
2012	48.79724
2013	48.89167
2014	48.95586
2015	48.96498
2016	48.89987
2017	48.81583
2018	48.8168