Year Percent 2000 44.48774 2001 45.59731 2002 46.72692 2003 47.61842 2004 48.4807 2005 49.35047 2006 50.22804 2007 51.1128 2008 52.00504 2009 52.90508 2010 53.81231 2011 54.72703 2012 55.64954 2013 56.57923 2014 57.52105 2015 58.47522 2016 59.44112 2017 60.41926 2018 61.40958 2019 62.41174 2020 63.42594 2021 64.45211 2022 65.10088