Year Percent 2000 68.77863 2001 69.97395 2002 71.17656 2003 72.38645 2004 73.60364 2005 74.82812 2006 76.05989 2007 77.29894 2008 78.54529 2009 79.79893 2010 81.05985 2011 82.32807 2012 83.60357 2013 84.88637 2014 86.17646 2015 87.47383 2016 88.44734 2017 89.42086 2018 90.39437 2019 91.36788 2020 91.36788 2021 91.36788 2022 91.36788