Year Percent 2000 80.77157 2001 81.49409 2002 82.1925 2003 82.87855 2004 83.55603 2005 84.22429 2006 84.88441 2007 85.53546 2008 86.17845 2009 86.81248 2010 87.43794 2011 88.0552 2012 88.664 2013 89.25007 2014 89.82033 2015 90.38417 2016 90.94185 2017 91.49295 2018 92.03884 2019 92.56595 2020 93.08742 2021 93.60318 2022 94.11337