Year % (national estimate) 2004 52.866 2005 53.138 2006 53.02 2007 53.69 2008 54.043 2009 53.873 2014 51.9 2015 51.66 2016 51.59 2017 51.36 2018 52.534 2019 45.376 2020 43.763 2021 42.92