Year	% female
1971	20.41467
1973	23.24786
1974	24.06417
1975	14.23841
1976	14.7651
1977	15.3951
1978	21.97687
1980	49.32229
1981	50.79485
1982	52.14724
1983	52.42848
1984	50.25974
1985	49.48139
1986	51.91532
1987	54.90673
1988	58.70774
1989	58.83347
1990	59.91254
1992	59.96835
1993	63.72963
1994	61.32597
1995	55.89375
1996	57.34341
1997	56.43004
1999	57.77073
2000	41.78744
2001	37.34375
2002	38.28611
2004	49.01541
2005	46.10082
2006	37.20393
2007	50.33207
2008	38.83363
2009	38.89174
2011	40.8896
2012	39.44954
2013	39.43541
2014	47.43402
2015	38.19918
2016	37.71049
2017	42.4234
2018	43.3951
2019	38.87107