Year Percent 2000 94.99403 2001 95.20688 2002 95.41974 2003 95.63259 2004 95.84545 2005 96.0583 2006 96.27116 2007 96.48401 2008 96.69687 2009 96.90972 2010 97.12258 2011 97.33543 2012 97.54829 2013 97.76114 2014 97.974 2015 98.14471 2016 98.14471 2017 98.14471 2018 98.14471 2019 98.14471 2020 98.14471 2021 98.14471 2022 98.14471