Year Percent 2000 99.15033 2001 99.18939 2002 99.22845 2003 99.26751 2004 99.30657 2005 99.34563 2006 99.38469 2007 99.42375 2008 99.46281 2009 99.50187 2010 99.50509 2011 99.50828 2012 99.55868 2013 99.60909 2014 99.6595 2015 99.70993 2016 99.76036 2017 99.81081 2018 99.82687 2019 99.83826 2020 99.84965 2021 99.84965 2022 99.84965