Year Percent 2000 97.82156 2001 97.87419 2002 97.92683 2003 97.97946 2004 98.0321 2005 98.08473 2006 98.13736 2007 98.19 2008 98.25493 2009 98.31987 2010 98.38483 2011 98.4498 2012 98.51478 2013 98.57977 2014 98.64478 2015 98.70981 2016 98.77484 2017 98.83989 2018 98.89259 2019 98.94529 2020 98.99799 2021 99.05069 2022 99.05069