Year % (national estimate) 1997 79.04540162980209 2000 86.069773115394 2007 64.54844406552586 2008 75.67361424591007 2009 73.91304347826086 2010 72.19917012448134 2011 73.30123060460139 2012 72.6183746534227 2013 72.5346329379771 2014 75.49816609185964 2015 74.84559158802315 2016 73.83084015960071 2017 74.76831514807994 2018 83.85825209328165 2019 87.09135309718248 2020 88.00584737781651 2021 87.41787305122494 2022 87.13296398891966