Year Percent 2000 87.3126 2001 87.80345 2002 88.29017 2003 88.77254 2004 89.25035 2005 89.72355 2006 90.19222 2007 90.65618 2008 91.11538 2009 91.56967 2010 92.01923 2011 92.43568 2012 92.82442 2013 93.21602 2014 93.61048 2015 94.00782 2016 94.40804 2017 94.81116 2018 95.21857 2019 95.62744 2020 95.95781 2021 96.28974 2022 96.62281