Year	% female
1972	16.61664
1973	13.90173
1974	14.23645
1975	14.35653
1976	17.48139
1977	17.93606
1978	17.87911
1979	19.23802
1980	20.00297
1981	19.633
1982	20.5368
1983	21.77572
1984	22.94879
1985	22.77263
1986	24.23021
1987	25.24206
1988	26.79352
1989	27.7668
1990	28.96835
1991	30.07749
1992	31.83548
1993	33.0063
1994	34.42604
1995	35.92499
1996	37.44724
1999	39.61127
2000	40.06239
2001	40.21477
2002	40.97828
2003	41.86974
2005	44.71038
2006	45.4649
2007	46.21894
2008	46.87606
2009	46.49695
2010	48.77799
2011	49.44984
2012	50.14842
2013	50.30992
2014	50.44887
2015	50.57863
2016	50.55539
2017	51.2535
2019	51.43063