Year Percent 2000 58.24095 2001 59.13206 2002 60.02317 2003 60.91428 2004 61.80539 2005 63.02111 2006 64.24605 2007 65.48022 2008 66.72361 2009 67.97623 2010 69.23808 2011 70.50916 2012 71.78947 2013 73.079 2014 74.37776 2015 75.68574 2016 77.00295 2017 78.32939 2018 79.66506 2019 81.00996 2020 82.36408 2021 82.36408 2022 82.36408