Year Percent 2000 72.53009 2001 72.53009 2002 73.33129 2003 74.09824 2004 74.8079 2005 75.51561 2006 76.22138 2007 76.92519 2008 77.62705 2009 78.32696 2010 79.02493 2011 79.72094 2012 80.41501 2013 81.10712 2014 81.79729 2015 82.5874 2016 83.37751 2017 84.16762 2018 84.16762 2019 84.16762 2020 84.16762 2021 84.16762