Year Percent 2000 98.39105 2001 98.39105 2002 98.39105 2003 98.40474 2004 98.41844 2005 98.43213 2006 98.44583 2007 98.45952 2008 98.47322 2009 98.48691 2010 98.5006 2011 98.5143 2012 98.52799 2013 98.54169 2014 98.55538 2015 98.56908 2016 98.58277 2017 98.59646 2018 98.61016 2019 98.62385 2020 98.63755 2021 98.65124 2022 98.66493