Year Percent 2000 94.93229 2001 95.18596 2002 95.43964 2003 95.69331 2004 95.94699 2005 96.20066 2006 96.45434 2007 96.70801 2008 96.96168 2009 97.21536 2010 97.46903 2011 97.72271 2012 97.97638 2013 98.23006 2014 98.48373 2015 98.7374 2016 98.99108 2017 99.24475 2018 99.24475 2019 99.24475 2020 99.24475 2021 99.24475