Year Percent 2000 75.16964 2001 75.52011 2002 75.73261 2003 75.9236 2004 76.11291 2005 76.29933 2006 77.40737 2007 78.89837 2008 80.34214 2009 81.73516 2010 83.07977 2011 84.37523 2012 85.46791 2013 86.5076 2014 87.52248 2015 88.5125 2016 89.4779 2017 90.41851 2018 91.33267 2019 92.2214 2020 92.33858 2021 92.44852 2022 92.56756