Year % female 1973 31.7514400482178 1974 31.7651500701904 1975 31.4118690490723 1976 31.8335494995117 1977 31.643180847168 1978 30.9974098205566 1979 30.5573406219482 1980 30.2661895751953 1981 29.5247993469238 1982 29.703540802002 1983 30.122709274292 1984 29.8579807281494 1985 29.9733505249023 1986 29.5384006500244 1987 29.8406295776367 1988 29.794189453125 1989 29.1962795257568 1990 29.0248699188232 1991 28.689510345459 1992 29.3985500335693 1993 29.9315299987793 1994 30.5709896087646 1995 31.0207405090332 1996 31.4235992431641 1997 31.0726509094238 1998 30.8981304168701 1999 30.5165901184082 2000 30.4280204772949 2001 30.9407405853271 2002 30.7036895751953 2003 30.5735092163086 2004 30.3211002349854 2005 31.0862998962402 2006 31.4415092468262 2007 32.4465789794922 2008 31.2712001800537 2009 31.9393100738525 2010 32.3266716003418 2011 32.6154403686523 2012 33.6155204772949 2013 34.6822319030762 2014 35.9417495727539 2015 36.4104194641113 2016 36.6545600891113 2017 37.7629699707031 2018 38.5130195617676 2019 39.0458984375 2020 39.6628189086914 2021 39.928840637207 2022 40.3152084350586