Year Percent 2000 95.8116 2001 96.00148 2002 96.19135 2003 96.34807 2004 96.50467 2005 96.66113 2006 96.81746 2007 96.97366 2008 97.12973 2009 97.28567 2010 97.44148 2011 97.59716 2012 97.7527 2013 97.90812 2014 98.06341 2015 98.21856 2016 98.37359 2017 98.52848 2018 98.68325 2019 98.83788 2020 98.99238 2021 99.14676 2022 99.21649