Year Percent 2000 99.6 2001 99.6 2002 99.6 2003 99.6 2004 99.49116 2005 98.77533 2006 98.05949 2007 97.34366 2008 96.62782 2009 95.91198 2010 95.19615 2011 94.48031 2012 93.76448 2013 93.04864 2014 92.3328 2015 91.61697 2016 90.90113 2017 90.1853 2018 89.46946 2019 88.75362 2020 88.75362 2021 88.75362 2022 88.75362