Year	% female
1970	53.07462
1971	53.37319
1972	53.76185
1973	54.29427
1974	54.58727
1975	54.98955
1976	55.10479
1977	55.10598
1978	55.16881
1979	55.02732
1980	54.55809
1981	53.98833
1982	53.35151
1983	53.3132
1984	52.80352
1985	52.40644
1986	51.81295
1987	51.69418
1988	51.66404
1989	51.49236
1990	51.60167
1991	51.38549
1992	51.10355
1993	50.65094
1994	50.41112
1995	50.09133
1996	49.94115
1997	49.88736
1998	49.62477
1999	49.72509
2000	49.67605
2001	49.63378
2002	49.44731
2003	49.45971
2004	49.26588
2005	49.29904
2006	49.10916
2007	48.94099
2008	48.9483
2009	48.75278
2012	48.9852
2013	48.8289
2014	48.71881
2015	48.86193