Year Percent 2000 98.74528 2001 98.81965 2002 98.89404 2003 98.96845 2004 99.04289 2005 99.11735 2006 99.19183 2007 99.26633 2008 99.34086 2009 99.41541 2010 99.48998 2011 99.56457 2012 99.63919 2013 99.71383 2014 99.78011 2015 99.80137 2016 99.82262 2017 99.84387 2018 99.86513 2019 99.88638 2020 99.90763 2021 99.92889 2022 99.95014