Year Percent 1995-01-01 0 1996-01-01 5 1997-01-01 5 1998-01-01 5 1999-01-01 3 2000-01-01 3 2001-01-01 3 2002-01-01 3 2003-01-01 3 2004-01-01 3 2005-01-01 3 2006-01-01 3 2007-01-01 3 2008-01-01 3 2009-01-01 3 2010-01-01 3 2011-01-01 3 2012-01-01 3 2013-01-01 3