Year Percent 2000 14.02539 2001 15.1676 2002 16.30981 2003 17.45202 2004 18.59423 2005 19.73644 2006 20.87865 2007 22.32508 2008 23.80306 2009 25.31261 2010 26.85372 2011 28.42639 2012 30.03061 2013 31.6664 2014 33.33374 2015 35.03265 2016 36.76311 2017 38.52514 2018 40.31872 2019 42.14386 2020 44.00056 2021 45.88882 2022 47.26773