Year % (national estimate) 2005 68.409 2006 68.097 2007 65.81 2008 67.14 2009 68.731 2010 67.414 2011 65.553 2012 64.506 2013 67.331 2014 66.537 2015 67.058 2016 64.873 2017 67.523 2018 68.97 2019 67.844 2020 58.1 2021 61.874 2022 67.755 2023 61.889