Year Percent 2000 12.18023 2001 12.18023 2002 12.18023 2003 12.18023 2004 12.18023 2005 12.37899 2006 12.57776 2007 12.77652 2008 12.97529 2009 13.12462 2010 13.27246 2011 13.4188 2012 13.56366 2013 13.70702 2014 13.8489 2015 13.98928 2016 14.12817 2017 14.26556 2018 14.40147 2019 14.53589 2020 14.66881 2021 14.66881 2022 14.66881