Year Percent 2000 43.45839 2001 44.48075 2002 45.49465 2003 46.5001 2004 47.49711 2005 48.48566 2006 49.46576 2007 50.43741 2008 51.40061 2009 52.35536 2010 53.30165 2011 54.2395 2012 55.16889 2013 56.08984 2014 57.00233 2015 57.90637 2016 58.80196 2017 59.9163 2018 61.03064 2019 62.14498 2020 63.25932 2021 64.37365 2022 65.48799