Year	% female
1971	14.26052
1972	16.69917
1973	19.23077
1974	21.9172
1975	28.14932
1976	27.07546
1977	27.31502
1978	24.70938
1979	25.94004
1980	24.06175
1981	25.4523
1982	31.80131
1983	25.61587
1984	26.5391
1985	28.44601
1986	30.05293
1987	34.16478
1988	34.65319
1989	34.83915
1990	36.21596
1991	37.22024
1992	37.72252
1993	38.10828
2000	43.05746
2001	44.77094
2002	43.03651
2003	43.54073
2004	42.57434
2005	42.08428
2006	42.12624
2007	41.75912
2008	41.28689
2009	42.2267
2010	42.14994
2011	42.672
2012	43.82804
2013	45.20098
2014	46.98196
2015	48.55393
2016	50.11986
2017	51.66855
2018	53.25895