Year % 1996 8.87 2001 8.87 2002 8.87 2003 8.87 2004 8.87 2005 8.87 2006 8.87 2007 8.84 2008 8.84 2009 8.84 2010 8.84 2011 8.84 2012 8.84 2013 8.84 2014 8.84 2015 8.79 2016 8.79 2017 8.86 2018 8.86 2019 8.86 2020 8.86 2021 8.86