Year Percent 2000 59.8525 2001 59.8525 2002 59.22371 2003 58.59714 2004 57.97276 2005 57.35059 2006 56.73062 2007 56.11285 2008 55.49729 2009 54.88393 2010 54.27278 2011 53.66383 2012 53.05708 2013 52.45254 2014 51.8502 2015 51.25006 2016 50.65213 2017 50.0564 2018 49.46287 2019 48.87155 2020 48.28243 2021 47.69551 2022 47.69551