Year Percent 2000-01-01 6.50 2001-01-01 3.94 2002-01-01 3.94 2003-01-01 3.94 2004-01-01 3.94 2005-01-01 1.51 2006-01-01 1.13 2007-01-01 1.08 2008-01-01 0.83 2009-01-01 1.47 2010-01-01 1.80 2011-01-01 1.64 2012-01-01 1.43 2013-01-01 1.47