Year	% female
1971	34.65002
1972	34.71994
1973	34.61174
1974	36.13221
1975	35.12531
1976	35.72951
1977	37.98063
1978	38.74656
1979	38.31558
1980	39.65768
1981	39.02025
1982	39.57804
1983	39.53282
1984	39.90265
1985	40.14035
1986	41.53345
1987	42.02684
1988	41.79478
1989	40.9346
1990	40.47201
1991	41.57693
1992	43.55039
1995	41.40091
1997	39.59822
1998	39.50395
1999	39.90354
2001	37.84506
2003	40.00026
2004	40.00029
2005	40
2006	39.12167
2007	40.80159
2008	38.61258
2009	37.49749
2011	36.57067
2012	37.68904
2013	37.24211
2014	37.00491
2015	37.00586
2016	36.59785