Year Percent 2000 66.39736 2001 67.22187 2002 68.04638 2003 68.87089 2004 69.69539 2005 70.5199 2006 71.34441 2007 72.16891 2008 72.99342 2009 73.81793 2010 74.64244 2011 75.46694 2012 76.29145 2013 77.11596 2014 77.94046 2015 78.76497 2016 79.58948 2017 80.41399 2018 81.23849 2019 82.063 2020 82.88751 2021 83.71202 2022 84.53652