Year % (national estimate) 1992 78.06862364064992 1993 80.71185666844983 1995 75.88140088110381 1996 75.11226425993478 1997 75.48347133716172 1998 75.22900787627732 1999 74.32830860908227 2001 74.46337800449461 2002 73.86384652197633 2003 73.37567787471545 2004 74.48826945768786 2005 74.33387186979834 2006 75.67683030487282 2007 74.52038759669601 2008 75.02126085047193 2009 74.01203907866724 2011 74.10873891739847 2012 73.53942053576364 2013 73.45092553102894 2014 73.24903048799143 2015 73.12644053357303 2016 71.90415421771995 2017 71.51131947370517 2018 71.26910683477506 2019 71.2264250621197 2020 65.45568984057806 2021 69.1041493641904 2022 71.13289977101789 2023 70.72387465352374