Year Percent 2000 84.7034 2001 84.7034 2002 84.85231 2003 85.00128 2004 85.15032 2005 85.29941 2006 85.44857 2007 85.59778 2008 85.74706 2009 85.8964 2010 86.0458 2011 86.19526 2012 86.34478 2013 86.49436 2014 86.644 2015 86.79371 2016 86.94347 2017 87.0933 2018 87.0933 2019 87.0933 2020 87.0933 2021 87.0933