Year Percent 2000 10.23055 2001 11.22601 2002 12.25726 2003 13.30231 2004 14.3614 2005 15.43416 2006 16.52116 2007 17.62137 2008 18.83024 2009 20.06456 2010 21.31701 2011 22.58677 2012 23.8737 2013 25.17766 2014 26.49849 2015 27.83605 2016 29.19017 2017 30.56033 2018 31.94672 2019 33.35031 2020 34.77058 2021 36.07188 2022 37.3798