Year Percent 2000 92.28115 2001 92.70948 2002 93.13782 2003 93.56615 2004 93.99448 2005 94.42282 2006 94.85115 2007 95.27949 2008 95.72885 2009 96.17841 2010 96.62815 2011 97.07809 2012 97.52821 2013 97.97852 2014 98.42901 2015 98.8797 2016 99.33057 2017 99.78164 2018 99.89711 2019 99.91901 2020 99.91901 2021 99.91901 2022 99.91901