Year % (national estimate) 1998 87.06067769897558 2000 80.90379008746356 2002 94.62224554039875 2003 87.05282942665859 2004 96.41300703989273 2005 94.6404569892473 2006 86.12782943697492 2007 86.22291021671828 2008 85.77229324620119 2009 84.80982754547603 2010 83.74386517270118 2011 82.66911024651114 2012 84.27019009565323 2013 82.39880380220016 2014 82.38103875687767 2015 81.69063062245807 2016 81.46472109346139 2017 82.2670163454501 2018 77.0844110735031 2019 79.10409773479257 2020 77.97997652820237 2021 76.83263454738068 2022 78.19069617847431