Year % of total population ages 15+ (national estimate) 1991 57.17 1994 54.11 1996 54.95 1997 53.7 1998 54.8 1999 53.13 2000 52.9 2001 55.5 2002 52.64 2003 54.51 2005 53.599 2006 53.357 2007 54.504 2008 55.019 2009 55.158 2010 53.789 2011 55.244 2012 55.193 2013 55.869 2014 56.069 2015 55.446 2016 55.107 2017 55.092 2018 54.789 2019 55.216 2020 54.381 2021 54.037 2022 52.815