Year Percent 1995-01-01 95 1996-01-01 95 1997-01-01 95 1998-01-01 96 1999-01-01 94 2000-01-01 94 2001-01-01 96 2002-01-01 96 2003-01-01 96 2004-01-01 96 2005-01-01 96 2006-01-01 96 2007-01-01 96 2008-01-01 96 2009-01-01 96 2010-01-01 96 2011-01-01 96 2012-01-01 95 2013-01-01 95