Year % of female population ages 15+ (national estimate) 1960 5.22 1966 5.84 1973 4.36 1975 5.14 1976 6.42 1977 6.92 1978 8.32 1979 7.77 1980 7.4 1981 5.95 1982 5.83 1983 17.15 1984 18.03 1986 9.84 1989 29.97 1990 26.74 1991 22.03 1992 22.8 1993 22.13 1994 22.98 1995 21.6 1996 14.5 1998 19.55 1999 20.37 2000 13.45 2001 20.16 2002 18.41 2005 23.09 2006 21.13 2007 23.16 2008 21.724 2009 22.766 2010 23.055 2011 22.375 2012 22.39 2013 22.916 2014 23.063 2015 22.666 2016 22.925 2017 21.928 2018 18.308 2019 15.609 2020 14.4 2021 15.341 2022 15.001