Year Percent 2000 89.90724 2001 90.22558 2002 90.5439 2003 90.8622 2004 91.23122 2005 91.60073 2006 91.97069 2007 92.3411 2008 92.71197 2009 93.0833 2010 93.45507 2011 93.82731 2012 94.19984 2013 94.57241 2014 94.94473 2015 95.31654 2016 95.68755 2017 96.05746 2018 96.42603 2019 96.77256 2020 96.76532 2021 96.75723 2022 96.74833