Year Percent 2000 84.35078 2001 84.57887 2002 84.80695 2003 85.03504 2004 85.26312 2005 85.71522 2006 86.1685 2007 86.62298 2008 87.07866 2009 87.53553 2010 87.9936 2011 88.45286 2012 88.91332 2013 89.37497 2014 89.83782 2015 90.30187 2016 90.76711 2017 91.23354 2018 91.70117 2019 92.17 2020 92.64002 2021 93.11123 2022 93.58364