Year	% female
1970	46.68077
1971	46.89581
1972	47.0083
1973	47.12874
1974	47.17183
1975	47.19687
1976	47.29799
1977	47.23175
1978	47.49884
1979	47.74994
1980	47.74271
1981	47.68935
1982	47.4266
1983	47.22043
1984	46.96646
1985	47.10386
1986	47.24946
1987	47.40351
1988	47.43163
1989	47.44466
1990	47.40358
1991	47.3679
1992	47.45943
1993	47.3254
1994	47.59436
1996	47.57702
2007	48.1194
2008	48.18488
2009	48.26206
2016	48.9451
2017	48.8777