Year Percent 2000 93.16409 2001 93.28076 2002 93.50458 2003 93.72866 2004 93.95301 2005 94.17763 2006 94.40251 2007 94.62767 2008 94.85309 2009 95.07878 2010 95.30473 2011 95.53095 2012 95.75745 2013 95.98421 2014 96.21123 2015 96.43853 2016 96.66609 2017 96.89392 2018 97.12202 2019 97.35038 2020 97.57901 2021 97.57901 2022 97.57901