Year Percent 2000 94.95038 2001 95.11704 2002 95.2838 2003 95.45065 2004 95.61758 2005 95.7846 2006 95.95171 2007 96.11891 2008 96.28619 2009 96.45357 2010 96.62103 2011 96.78858 2012 96.95622 2013 97.12395 2014 97.29176 2015 97.45966 2016 97.62766 2017 97.79574 2018 98.12145 2019 98.64509 2020 98.82682 2021 98.96421 2022 99.10161