Year Percent 2000 10.65846 2001 11.44036 2002 12.22187 2003 13.003 2004 13.78375 2005 14.56411 2006 15.34409 2007 16.12369 2008 16.9029 2009 17.68173 2010 18.46017 2011 19.23823 2012 20.0159 2013 20.79319 2014 21.5701 2015 22.34662 2016 23.12276 2017 23.89852 2018 24.67389 2019 25.44887 2020 25.44887 2021 25.44887 2022 25.44887