Year Percent 2000 84.74335 2001 84.74289 2002 84.74177 2003 84.74 2004 84.73758 2005 84.7345 2006 84.73076 2007 84.72637 2008 84.72133 2009 84.71563 2010 84.70927 2011 84.70226 2012 84.6946 2013 84.68628 2014 84.67731 2015 84.66768 2016 84.6574 2017 84.64646 2018 84.63487 2019 84.62262 2020 84.62262 2021 84.62262 2022 84.62262