Year Percent 1993-01-01 31.5777 1994-01-01 10.3600 1995-01-01 16.2189 1996-01-01 14.3100 1997-01-01 9.8100 1998-01-01 11.9500 1999-01-01 9.2700 2000-01-01 7.0500 2001-01-01 6.7500 2002-01-01 9.3600 2003-01-01 9.7900 2004-01-01 9.6075 2005-01-01 8.3300 2006-01-01 7.1600 2007-01-01 6.6500 2008-01-01 7.7900 2009-01-01 8.9000 2010-01-01 8.2900 2011-01-01 7.4800 2012-01-01 7.5000 2013-01-01 7.9400