Year Percent 2000 21.61193 2001 22.40907 2002 23.20621 2003 24.00336 2004 25.06342 2005 26.14039 2006 27.23427 2007 28.34504 2008 29.47272 2009 30.6173 2010 31.77878 2011 32.95716 2012 34.15245 2013 35.36463 2014 36.59372 2015 37.83971 2016 39.10261 2017 40.3824 2018 41.6791 2019 42.9927 2020 44.3232 2021 45.6706 2022 47.03491