Year	% female
1971	21.6763000488281
1972	24.21875
1973	27.6422805786133
1974	25.4174404144287
1975	19.1126308441162
1976	22.9199409484863
1977	20.0762405395508
1978	21.269100189209
1979	19.4589004516602
1980	19.3843593597412
1981	20.7943897247314
1988	12.7764101028442
1989	18.2971801757812
1990	17.2844200134277
1991	17.6576595306396
1992	17.9682102203369
1996	20.7440795898438
1997	20.5643997192383
1998	19.276439666748
1999	18.0339298248291
2000	18.0515804290771
2001	16.8446292877197
2002	18.7755107879639
2003	19.1103000640869
2004	18.6123600006104
2005	16.6892795562744
2006	16.3631401062012
2010	18.3006496429443
2011	19.3456897735596
2013	20.1267795562744
2014	20.0204792022705
2015	20.1399307250977
2016	20.0715408325195
2017	21.6019096374512
2018	22.3986301422119