Year Percent 2000 66.2651 2001 67.29204 2002 68.31898 2003 69.34592 2004 70.37285 2005 71.39979 2006 72.42673 2007 73.45367 2008 74.48061 2009 75.60897 2010 76.74008 2011 77.87395 2012 79.01058 2013 80.14997 2014 81.29212 2015 82.43702 2016 83.58469 2017 84.73511 2018 85.88829 2019 87.04423 2020 88.20293 2021 89.36438 2022 90.5286