Year % (national estimate) 2001 18.761 2006 12.474 2007 13.746 2008 17.24 2009 16.553 2010 13.821 2011 13.145 2012 10.789 2013 11.495 2014 10.83 2015 12.097 2016 13.801 2017 17.443 2018 19.647 2019 23.093 2020 21.025 2021 21.322 2022 19.973 2023 18.869