Year % (national estimate) 2001 23.547 2006 19.95 2007 20.637 2008 23.011 2009 23.626 2010 23.127 2011 22.874 2012 22.514 2013 22.939 2014 22.674 2015 23.164 2016 22.423 2017 24.809 2018 24.992 2019 26.628 2020 29.905 2021 33.275 2022 34.762 2023 36.768