Year	% female
1971	48.56568
1972	48.55819
1973	48.61223
1974	48.78553
1975	49.18994
1976	48.87001
1977	48.99126
1978	49.38844
1979	49.62936
1980	49.5195
1981	49.9551
1982	50.21838
1983	49.78787
1984	50.27158
1985	50.1448
1986	50.04304
1987	50.05107
1988	50.10795
1989	50.22026
1990	49.89269
1991	49.68593
1992	49.23965
1993	48.26812
1994	48.17271
1995	47.55732
1996	47.46489
1997	47.8363
1998	48.9046
1999	49.36394
2000	49.37079
2001	49.29543
2002	49.28863
2003	49.27443
2004	49.46234
2005	48.93927
2006	48.53521
2007	48.33833
2008	48.10032
2009	48.02219
2010	48.14485
2011	48.20324
2012	48.135
2013	47.73332
2014	47.67832
2015	47.92183
2016	47.96482
2017	47.60539