Year Percent 2000 64.7959 2001 65.62688 2002 66.58858 2003 67.54955 2004 68.51022 2005 69.58072 2006 70.66761 2007 71.74674 2008 72.81733 2009 73.87871 2010 74.93213 2011 75.9759 2012 77.01032 2013 78.03476 2014 79.04948 2015 80.05387 2016 81.04817 2017 82.03181 2018 84.03338 2019 84.98185 2020 85.91876 2021 86.84331 2022 87.01946