Year Percent 2000 96.93201 2001 96.97376 2002 97.01551 2003 97.05725 2004 97.099 2005 97.23654 2006 97.37416 2007 97.51186 2008 97.64964 2009 97.78751 2010 97.92546 2011 98.06349 2012 98.2016 2013 98.3398 2014 98.47808 2015 98.61644 2016 98.75488 2017 98.89341 2018 99.03201 2019 99.1707 2020 99.30948 2021 99.30948 2022 99.30948