Year % (national estimate) 1986 45.47 1997 33.47 2004 42.22 2006 54.79 2007 67.54 2008 71.36 2009 71.02 2011 68.75 2012 69.24 2013 64.18 2014 67.41 2015 69.16 2016 72.3 2017 67.77 2018 72.84 2019 67.41 2020 66.41 2021 56.56 2022 59.07