Year Percent 2000 76.23622 2001 77.78792 2002 79.29886 2003 80.69661 2004 82.05784 2005 83.40381 2006 84.7343 2007 86.0494 2008 87.34941 2009 88.63415 2010 89.90372 2011 91.1582 2012 92.39782 2013 93.6188 2014 94.82516 2015 96.01861 2016 97.1993 2017 98.36717 2018 99.52249 2019 99.59111 2020 99.59347 2021 99.5959 2022 99.59839