Year Percent 2000 7.69469 2001 7.92617 2002 8.15826 2003 8.39095 2004 8.94955 2005 9.53865 2006 10.15665 2007 10.7956 2008 11.45551 2009 12.13622 2010 12.83773 2011 13.56018 2012 14.30359 2013 15.0676 2014 15.85256 2015 16.65829 2016 17.48495 2017 18.33386 2018 19.20548 2019 20.09974 2020 21.01671 2021 21.9565 2022 22.91919