Year Percent 2000 54.30348 2001 53.93386 2002 53.56424 2003 53.19462 2004 52.825 2005 52.45539 2006 52.08577 2007 51.71615 2008 51.34653 2009 50.97691 2010 50.6073 2011 50.23768 2012 49.86806 2013 49.49844 2014 49.12882 2015 48.75921 2016 48.38959 2017 48.01997 2018 47.65035 2019 47.28073 2020 47.28073 2021 47.28073 2022 47.28073