Year Percent 2000 29.24785 2001 29.24785 2002 29.24785 2003 30.56182 2004 31.79717 2005 33.02604 2006 34.24843 2007 35.46434 2008 36.67376 2009 37.87671 2010 39.07317 2011 40.26315 2012 41.44665 2013 42.62367 2014 43.79421 2015 44.95827 2016 46.11584 2017 47.26694 2018 48.41155 2019 49.54968 2020 50.68133 2021 51.8065 2022 51.8065