Year Percent 2000 93.37744 2001 93.52908 2002 93.72967 2003 93.93042 2004 94.13133 2005 94.33239 2006 94.53362 2007 94.735 2008 94.93654 2009 95.13824 2010 95.3401 2011 95.54212 2012 95.7443 2013 95.94663 2014 96.14912 2015 96.35178 2016 96.55459 2017 96.75755 2018 96.96068 2019 97.16397 2020 97.36741 2021 97.57101 2022 97.77477