Year Percent 2000 95.82294 2001 95.82294 2002 95.96808 2003 96.11322 2004 96.25836 2005 96.4035 2006 96.54864 2007 96.69378 2008 96.83892 2009 96.98405 2010 97.12919 2011 97.27433 2012 97.41947 2013 97.56461 2014 97.70975 2015 97.85489 2016 98.00003 2017 98.14517 2018 98.29031 2019 98.43545 2020 98.58059 2021 98.72573 2022 98.87087