Year Percent 2000 84.15572 2001 84.91295 2002 85.67019 2003 86.42742 2004 87.18465 2005 88.01249 2006 88.84153 2007 89.67179 2008 90.50327 2009 91.33596 2010 92.16987 2011 93.005 2012 93.84134 2013 94.6789 2014 95.51767 2015 96.35766 2016 97.19886 2017 98.04128 2018 98.88492 2019 99.20259 2020 99.28128 2021 99.28128 2022 99.28128