Year % (national estimate) 1986 29.57307237337348 1997 37.48878923766816 2004 44.274809160305345 2007 51.98019801980198 2009 51.1557684298209 2010 54.402417422111085 2011 54.45048056832428 2012 54.765886287625406 2013 51.906440243511696 2014 57.30664998957682 2015 60.197710718002085 2016 60.50495942290352 2017 61.09368465077374 2018 60.96662103822259 2019 60.410801793347936 2020 60.992167101827675 2021 62.46724661985117 2022 64.75401237805517