Year Percent 2000 98.14437 2001 98.14437 2002 98.14437 2003 98.14437 2004 98.14437 2005 98.20544 2006 98.26652 2007 98.32759 2008 98.38867 2009 98.44974 2010 98.51082 2011 98.57189 2012 98.63297 2013 98.69404 2014 98.75512 2015 98.8162 2016 98.87727 2017 98.93835 2018 98.99942 2019 99.0605 2020 99.0605 2021 99.0605 2022 99.0605