Year Percent 2000 79.54241 2001 80.47267 2002 81.40292 2003 82.33318 2004 83.03585 2005 83.67875 2006 84.31535 2007 84.94567 2008 85.56968 2009 86.18741 2010 86.79884 2011 87.40398 2012 88.00282 2013 88.59537 2014 89.18162 2015 89.76158 2016 90.33525 2017 90.90263 2018 91.4637 2019 92.01849 2020 92.56698 2021 92.79509 2022 93.63749