Year Percent 2000 89.81408 2001 90.27708 2002 90.74033 2003 91.20385 2004 91.66764 2005 92.13169 2006 92.596 2007 93.06058 2008 93.52542 2009 93.99052 2010 94.45589 2011 94.92152 2012 95.38742 2013 95.85357 2014 96.32 2015 96.78668 2016 97.25363 2017 97.72085 2018 98.18832 2019 98.65606 2020 99.10845 2021 99.55451 2022 99.55451