Year % 2001 36.95 2002 36.95 2003 37.05 2004 37.05 2005 37.05 2006 37.05 2007 37.07 2008 37.07 2009 37.07 2010 37.07 2011 37.07 2012 37.07 2013 37.07 2014 37.07 2015 36.98 2016 36.98 2017 36.98 2018 36.98 2019 36.98 2020 36.98 2021 36.98