Year	% female
1970	43.43876
1971	43.40846
1972	43.3928
1973	43.33081
1974	43.22603
1975	44.13121
1976	44.65779
1977	44.78579
1978	44.76871
1979	44.75891
1980	44.80613
1981	44.7974
1982	44.71985
1983	44.61343
1984	44.73692
1985	44.8755
1986	45.24102
1987	45.40004
1988	45.48552
1989	45.53349
1990	45.66497
1991	45.87446
1992	46.03108
1993	46.16583
1994	46.25883
1995	46.29946
1996	46.34501
1997	46.47695
1998	46.52095
1999	46.59856
2000	46.59285
2001	46.68522
2002	46.7077
2003	47.20264
2004	47.15723
2005	47.21002
2006	47.29994
2007	47.34697
2008	47.52058
2009	47.61061
2010	47.66035
2011	47.70734
2012	47.78197
2013	48.22063
2014	48.23253
2015	48.28504
2016	48.50568
2017	48.4537
2018	48.42648