Year % of female population ages 15+ (national estimate) 1964 20.31 1973 23.88 1980 22.4 1985 31.59 1986 32.6 1987 34.3 1989 46.36 1993 56.39 1996 37.3 2000 57.1 2001 53.551 2002 52.525 2003 53.876 2004 53.099 2005 51.289 2007 50.13 2008 50.518 2009 54.048 2010 54.583 2011 55.112 2012 56.169 2013 55.458 2014 55.155 2015 55.406 2016 54.873 2017 54.501 2018 53.42 2019 52.575 2020 51.201 2021 51.776 2022 51.105 2023 52.041