Year Percent 2000 88.57915 2001 88.58243 2002 88.58559 2003 88.58888 2004 88.59215 2005 89.16473 2006 89.73704 2007 90.3103 2008 90.88395 2009 91.4569 2010 92.02916 2011 92.32612 2012 92.6148 2013 92.89715 2014 93.17623 2015 93.45211 2016 93.72476 2017 93.99415 2018 94.2608 2019 94.52446 2020 94.78496 2021 95.04204 2022 95.29554