Year Percent 2000 54.03901 2001 56.05489 2002 58.0754 2003 60.10053 2004 62.13028 2005 64.16465 2006 66.20365 2007 68.24728 2008 70.29552 2009 72.34839 2010 74.40589 2011 76.468 2012 78.53475 2013 80.60611 2014 82.6821 2015 84.76271 2016 86.84795 2017 88.9378 2018 91.03229 2019 93.13139 2020 94.83115 2021 94.83115 2022 94.83115