Year % 1996 7.12 1997 7.12 1998 7.12 1999 7.12 2000 7.12 2001 7.12 2002 7.12 2003 7.12 2004 7.12 2005 6.75 2006 6.75 2007 6.5 2008 6.5 2010 5.05 2011 5.05 2012 5.1 2013 5.1 2015 5.1 2019 5.02 2021 5.02