Year Percent 2003-01-01 1.50 2004-01-01 1.50 2005-01-01 1.50 2006-01-01 1.50 2007-01-01 1.50 2008-01-01 1.50 2009-01-01 1.50 2010-01-01 1.50 2011-01-01 1.50 2012-01-01 1.50 2013-01-01 1.50 2014-01-01 4.21 2015-01-01 4.44