Year	% female
1970	48.36747
1971	48.13678
1972	48.03894
1973	48.32932
1974	48.59205
1975	48.77094
1976	49.1131
1977	49.25029
1978	49.46136
1979	49.50558
1980	49.85547
1981	49.62642
1982	49.43027
1983	49.42546
1984	49.27248
1985	49.61984
1986	49.7576
1987	49.99347
1988	50.07746
1989	50.21388
1990	50.55328
1991	50.67371
1992	50.79765
1993	50.79396
1994	50.80457
1995	50.58554
1996	50.76877
1997	50.59547
1998	50.58592
1999	50.23596
2000	50.18112
2001	50.10703
2002	50.07524
2003	50.06208
2004	49.87687
2005	49.9907
2006	50.23517
2007	50.2373
2008	50.4254
2009	50.56256
2010	50.5711
2011	50.42376
2012	50.39783
2013	50.43089
2014	50.49787
2015	50.48685
2016	50.57366
2017	50.61327
2018	50.58611