Year Percent 2000 45.72511 2001 45.62574 2002 45.51702 2003 45.39894 2004 45.27151 2005 45.13473 2006 44.9886 2007 44.83311 2008 44.66827 2009 44.49408 2010 44.31054 2011 44.11765 2012 43.9154 2013 43.7038 2014 43.48285 2015 43.25254 2016 43.01289 2017 42.76388 2018 42.50552 2019 42.23781 2020 41.96074 2021 41.96074 2022 41.96074