Year Percent 2000 68.41876 2001 69.00917 2002 70.09894 2003 71.19718 2004 72.30389 2005 73.41907 2006 74.54273 2007 75.67486 2008 76.81546 2009 77.96453 2010 79.12207 2011 80.28809 2012 81.46258 2013 82.64554 2014 83.83697 2015 85.03688 2016 86.24525 2017 87.4621 2018 88.68742 2019 89.92122 2020 91.16348 2021 92.41422 2022 93.67343