Year % of female population ages 15+ (national estimate) 1964 12.99 1973 14.25 1978 13.75 1979 14.15 1980 14.32 1981 13.8 1985 14.07 1987 27.5 1989 28.42 1994 18.36 1999 23.24 2000 45.6 2002 47.2 2003 48.314 2004 42.448 2006 47.42 2010 41.99 2011 40.266 2012 45.554 2013 40.324 2014 40.568 2015 38.86 2016 40.082 2017 39.199 2018 39.102 2019 37.835 2021 43.205 2022 41.526