Year Percent 2000 93.00446 2001 93.03687 2002 93.06928 2003 93.10168 2004 93.13409 2005 93.16649 2006 93.1989 2007 93.2313 2008 93.26371 2009 93.29612 2010 93.32852 2011 93.36093 2012 93.39333 2013 93.42574 2014 93.45815 2015 93.49055 2016 93.52296 2017 93.55536 2018 93.58777 2019 93.58777 2020 93.58777 2021 93.58777 2022 93.58777