Year Percent 2000 59.75292 2001 60.72144 2002 61.68996 2003 62.65848 2004 63.627 2005 64.59551 2006 65.56403 2007 66.53255 2008 67.50107 2009 68.46959 2010 69.43811 2011 70.40663 2012 71.37515 2013 72.34367 2014 73.31219 2015 74.28071 2016 75.24923 2017 76.21775 2018 77.18627 2019 78.15479 2020 79.12331 2021 80.09183 2022 80.09183