Year Percent 2000 96.99059 2001 97.15192 2002 97.31324 2003 97.47457 2004 97.52345 2005 97.56008 2006 97.5963 2007 97.63212 2008 97.66752 2009 97.70251 2010 97.73709 2011 97.77126 2012 97.80502 2013 97.83837 2014 97.87131 2015 97.90383 2016 98.06272 2017 98.2216 2018 98.38048 2019 98.48438 2020 98.48438 2021 98.48438 2022 98.48438