Year % (national estimate) 2000 18.246983571036345 2001 15.899420966761571 2002 16.28881504640618 2003 19.189785330392368 2004 20.152085218523283 2005 19.705859344441837 2006 21.027165491287438 2007 23.00736719658783 2008 22.778056741149886 2009 22.422286658560157 2010 21.078065214408756 2011 23.06367041198502 2012 23.820423061963318 2013 23.101683601572347 2014 24.191703919326336 2015 25.42131804663592 2016 24.54842594185446 2017 24.77677614754918 2018 25.16436149369403 2019 25.8398968924531 2020 24.74701718286934 2021 24.98765647236502 2022 26.2628119035838