Year Percent 2000 6.24573 2001 6.34853 2002 7.23252 2003 8.13639 2004 9.05995 2005 10.00244 2006 10.96385 2007 11.94375 2008 12.9418 2009 13.95733 2010 14.99044 2011 16.04046 2012 17.10693 2013 18.18926 2014 19.28711 2015 20.40011 2016 21.52793 2017 22.67011 2018 23.82631 2019 24.99607 2020 26.1792 2021 27.37524 2022 28.58389