Year Percent 2000 2.02462 2001 2.02462 2002 2.77921 2003 3.52705 2004 4.26816 2005 5.00252 2006 5.73013 2007 6.451 2008 7.16513 2009 7.87252 2010 8.57316 2011 9.26706 2012 9.95421 2013 10.63463 2014 11.30829 2015 11.97522 2016 12.6354 2017 13.28883 2018 13.93553 2019 14.57548 2020 15.20868 2021 15.91148 2022 16.61428