Year Percent 2000 83.5686 2001 83.5686 2002 83.5686 2003 83.5686 2004 83.0738 2005 82.55031 2006 81.99814 2007 81.41728 2008 80.80774 2009 80.16952 2010 79.50261 2011 78.80701 2012 78.08273 2013 77.32977 2014 76.54812 2015 77.27096 2016 77.9938 2017 78.71664 2018 79.43948 2019 79.43948 2020 79.43948 2021 79.43948 2022 79.43948