Year Percent 2000 47.63518 2001 48.9695 2002 51.1154 2003 53.30436 2004 55.53637 2005 57.81143 2006 60.12955 2007 62.49073 2008 64.89496 2009 67.34224 2010 69.83259 2011 72.36598 2012 74.94243 2013 77.56193 2014 80.22449 2015 82.93011 2016 85.67878 2017 88.4705 2018 91.30528 2019 94.18311 2020 97.104 2021 97.104 2022 97.104