Year Percent 2000 76.47483 2001 76.47483 2002 76.47483 2003 76.47483 2004 76.47483 2005 75.41106 2006 74.14514 2007 72.885 2008 71.63064 2009 70.38207 2010 69.13929 2011 67.90229 2012 66.67107 2013 65.44564 2014 64.226 2015 63.01214 2016 61.80406 2017 60.60177 2018 59.40527 2019 59.40527 2020 59.40527 2021 59.40527 2022 59.40527