Year Percent 2000 75.30869 2001 76.02843 2002 76.77941 2003 77.53098 2004 78.28313 2005 79.03588 2006 79.7892 2007 80.54312 2008 81.29762 2009 82.0527 2010 82.80838 2011 83.56463 2012 84.32148 2013 85.07891 2014 85.83693 2015 86.59553 2016 87.35472 2017 88.11449 2018 88.87485 2019 89.6358 2020 90.39733 2021 91.15945 2022 91.92216