Year Percent 2000 93.90996 2001 94.03541 2002 94.16085 2003 94.2863 2004 94.41174 2005 94.53718 2006 94.66263 2007 94.78807 2008 94.91352 2009 95.03896 2010 95.1644 2011 95.28985 2012 95.41529 2013 95.54074 2014 95.66618 2015 95.79162 2016 95.91707 2017 96.04251 2018 96.16796 2019 96.2934 2020 96.41884 2021 96.41884 2022 96.41884