Year % (national estimate) 2001 34.85 2006 29.394 2007 30.834 2008 33.215 2009 32.784 2010 32.102 2011 31.615 2012 31.526 2013 31.419 2014 31.476 2015 31.735 2016 32.115 2017 33.608 2018 34.195 2019 35.242 2020 40.092 2021 43.306 2022 44.71 2023 46.335