Year % (national estimate) 1986 68.29 1997 51.93 2004 59.51 2007 79.88 2009 83 2011 81.89 2012 80.82 2013 77.21 2014 80.25 2015 80.44 2016 85.98 2017 77.87 2018 84.89 2019 78.19 2020 76.88 2021 65.91 2022 69.63