Year	% female
1971	37.85088
1973	39.02273
1974	38.59582
1975	38.66321
1976	38.25084
1977	37.99722
1978	38.38977
1979	38.14033
1980	38.6299
1981	37.95623
1982	38.29591
1983	37.53675
1984	37.37987
1985	37.62567
1987	40.2263
1988	39.15037
1989	39.14087
1990	39.05051
1995	41.16859
1999	43.63663
2000	43.99517
2001	44.67201
2002	44.90109
2003	45.00833
2004	44.5126
2005	44.51634
2006	44.89941
2007	45.70736
2008	45.94317
2009	45.8274
2011	46.3113
2012	46.29761
2013	46.62042
2014	47.35436
2015	47.60539
2016	48.08399
2017	48.24081
2018	48.54687
2019	48.88477