Year Percent 2000 88.10357 2001 88.37854 2002 88.65383 2003 88.92945 2004 89.20539 2005 89.48166 2006 89.75825 2007 90.03517 2008 90.31241 2009 90.58998 2010 90.86788 2011 91.1461 2012 91.42465 2013 91.70352 2014 91.98272 2015 92.26224 2016 92.54209 2017 92.82227 2018 93.10277 2019 93.3836 2020 93.66475 2021 93.94623 2022 94.22803