Year % 1995 32.93 1996 32.96 1997 32.96 1998 32.96 1999 32.96 2000 32.96 2001 32.96 2002 33.09 2003 33.09 2004 33.09 2005 33.09 2006 33.09 2007 33.09 2008 32.97 2009 32.97 2010 32.97 2011 32.97 2012 32.97 2013 32.96 2014 32.96 2015 32.96 2016 32.96 2017 32.96 2018 33.04 2019 33.04 2020 33.04 2021 33.04