Year % (national estimate) 1997 26.56 2007 13.248 2008 30.134 2011 30.94 2012 29.31 2013 32.158 2014 32.829 2015 35.312 2016 29.869 2017 32.829 2018 38.107 2019 43.554 2020 35.437 2021 33.584 2022 34.566