Year Percent 2000 82.3616 2001 83.46729 2002 84.61996 2003 85.75393 2004 86.86839 2005 87.95676 2006 88.97896 2007 89.98677 2008 90.97983 2009 91.95755 2010 92.91983 2011 93.86634 2012 94.79608 2013 95.70915 2014 96.60578 2015 97.48622 2016 98.18624 2017 98.65984 2018 98.765 2019 98.87231 2020 98.98172 2021 99.12699 2022 99.13145