Year Percent 2000 57.33225 2001 57.33225 2002 57.33225 2003 57.33225 2004 57.33225 2005 56.89278 2006 56.45331 2007 56.01384 2008 55.57437 2009 54.99797 2010 54.42375 2011 53.85171 2012 53.28186 2013 52.71419 2014 52.14871 2015 51.5854 2016 51.02428 2017 50.46535 2018 49.90859 2019 49.35402 2020 48.80163 2021 48.80163 2022 48.80163