Year Percent 2000 91.7216 2001 91.88144 2002 92.03835 2003 92.1811 2004 92.31082 2005 92.44151 2006 92.57125 2007 92.70004 2008 92.82785 2009 92.95457 2010 93.08033 2011 93.20513 2012 93.32897 2013 93.44703 2014 93.56357 2015 93.68002 2016 93.79619 2017 93.91318 2018 94.03072 2019 94.14848 2020 94.26628 2021 94.5576 2022 94.6527