Year	% female
1971	36.48354
1972	36.47259
1973	38.59043
1974	40.71906
1975	42.84132
1976	44.96453
1977	47.09052
1978	49.21147
1979	49.23109
1980	49.25497
1981	49.26242
1982	49.17984
1983	49.05043
1984	48.85852
1985	48.66105
1986	48.90366
1987	48.93261
1988	48.85341
1989	48.80153
1990	48.69007
1991	49.11855
1992	48.92366
1993	48.72303
1994	48.57482
1995	49.06165
1996	48.74962
1997	49.1684
1998	49.60171
1999	49.35227
2000	49.04539
2001	49.06566
2002	48.53076
2003	48.75434
2004	49.15528
2005	49.108
2006	48.58974
2007	48.89179
2008	48.63834
2009	49.05265
2010	48.97372
2011	48.83814
2012	48.91586
2013	48.87979
2014	49.12862
2015	49.15822
2016	48.81452
2017	48.84231
2018	48.8421