Year Percent 2000 88.01817 2001 88.02355 2002 88.02892 2003 88.03429 2004 88.03967 2005 88.40176 2006 88.7639 2007 89.12608 2008 89.4883 2009 89.85057 2010 90.21288 2011 90.57523 2012 90.93763 2013 91.30007 2014 91.66255 2015 92.02508 2016 92.38765 2017 92.75027 2018 93.11293 2019 93.47563 2020 93.83838 2021 93.83838 2022 93.83838