Year Percent 2000 97.02273 2001 97.02273 2002 97.13694 2003 97.25115 2004 97.36536 2005 97.49102 2006 97.6167 2007 97.74242 2008 97.86816 2009 97.99392 2010 98.11972 2011 98.24554 2012 98.37138 2013 98.49726 2014 98.62316 2015 98.74909 2016 98.87504 2017 99.00102 2018 99.00102 2019 99.00102 2020 99.00102 2021 99.00102 2022 99.00102