Year % 1994 5 1997 15.22 2001 13.4 2002 11.71 2003 11.71 2005 11.7 2006 11.7 2007 10.08 2008 9.67 2009 9.63 2010 9.64 2011 9.63 2012 9.63 2014 9.64 2016 9.64 2018 9.66 2020 9.66 2021 9.66