Year	% female
1971	30.94264
1972	31.33119
1973	31.44488
1974	30.94531
1975	30.55173
1976	31.40796
1977	31.07093
1978	31.81462
1979	31.93027
1980	33.63584
1981	32.0444
1982	32.28988
1983	32.55742
1984	33.18251
1985	33.2727
1986	33.51968
1987	33.62222
1988	33.72204
1989	33.81504
1990	33.9088
1991	33.26634
1992	33.58426
1993	34.04515
1994	35.17505
1995	35.76604
1996	36.45392
1997	37.23453
1998	38.37563
1999	39.27864
2000	40.17722
2001	40.55876
2002	41.26074
2003	41.853
2004	42.78876
2005	43.55402
2006	44.42033
2008	45.52908
2009	46.02964
2010	46.46604
2011	46.55091
2012	46.8943
2013	47.10806
2014	47.34518
2015	47.49697
2016	47.65223
2017	47.61252
2018	47.67029