Year Percent 2000 96.87856 2001 96.93866 2002 96.94078 2003 96.94479 2004 96.95064 2005 96.958 2006 96.96704 2007 96.97763 2008 96.98974 2009 97.00308 2010 97.01775 2011 97.02389 2012 97.02949 2013 97.03602 2014 97.04369 2015 97.05221 2016 97.0617 2017 97.07118 2018 97.08077 2019 97.09037 2020 97.09991 2021 97.10942 2022 97.15646