Year Percent 2000 54.38957 2001 56.91422 2002 59.40975 2003 61.9028 2004 64.39338 2005 66.88149 2006 69.36712 2007 71.85028 2008 74.33096 2009 76.80917 2010 79.2849 2011 81.75817 2012 84.22895 2013 86.69727 2014 89.16311 2015 91.62647 2016 94.08736 2017 96.54578 2018 99.00172 2019 99.11123 2020 99.11123 2021 99.11123 2022 99.11123