Year Percent 2002 74.47439 2003 75.63329 2004 76.79219 2005 77.95108 2006 79.10998 2007 80.26888 2008 81.42777 2009 82.6866 2010 83.94824 2011 85.21268 2012 86.47992 2013 87.74997 2014 89.02283 2015 90.29849 2016 91.57695 2017 92.85822 2018 94.14229 2019 95.31521 2020 96.48813 2021 97.66105 2022 98.44156