Year Percent 2000 73.1288 2001 74.03791 2002 74.92798 2003 75.81264 2004 76.69154 2005 77.56479 2006 78.43291 2007 79.29598 2008 80.15408 2009 81.00653 2010 81.85421 2011 82.70058 2012 83.54222 2013 84.37851 2014 85.21064 2015 86.03796 2016 86.86024 2017 87.67796 2018 88.49054 2019 89.2988 2020 90.07848 2021 90.81099 2022 90.8835