Year	% female
1970	13.68692
1999	40.23683
2000	40.32528
2001	40.4977
2002	41.23482
2003	42.04085
2004	43.67002
2005	44.9497
2006	45.72097
2007	46.44298
2008	47.03829
2009	46.66109
2010	48.96717
2011	49.64337
2012	50.3466
2013	50.51475
2014	50.6588
2015	50.78954
2016	50.77086
2017	51.48002
2019	51.43375