Year % (national estimate) 2005 69.38 2006 65.1 2009 71.64 2010 70.72 2011 70.9 2012 64.42 2013 70 2014 69.67 2015 69.87 2018 68.257 2019 70.21 2020 69.514 2021 70.454 2022 70.229 2023 70.713