Year Percent 2000 65.51375 2001 65.53836 2002 65.56296 2003 65.58757 2004 65.61217 2005 65.63678 2006 65.66138 2007 65.68599 2008 65.7106 2009 65.7352 2010 65.75981 2011 65.78441 2012 65.80902 2013 65.83362 2014 65.85823 2015 65.88283 2016 65.90744 2017 65.93204 2018 65.93204 2019 65.93204 2020 65.93204 2021 65.93204