Year % of female population ages 15+ (national estimate) 1960 18.45 1970 21.14 1973 37.17 1976 32.37 1980 30.06 1985 41.09 1986 41.14 1987 43.17 1988 43.34 1989 44.421 1990 44.951 1991 44.02 1992 53.177 1993 52.53 1995 50.235 1996 49.002 1997 50.037 1998 50.768 1999 52.061 2001 54.387 2002 55.913 2003 56.018 2004 56.948 2005 58.11 2006 57.834 2007 57.583 2008 57.213 2009 57.714 2011 54.687 2012 52.467 2013 52.445 2014 52.383 2015 53.032 2016 53.277 2017 54.154 2018 54.429 2019 55.198 2020 50.247 2021 52.373 2022 53.747 2023 53.098