Year Percent 1996-01-01 7.7238600000000000 1997-01-01 5.5034800000000010 1998-01-01 5.6856400000000000 1999-01-01 4.9256600000000000 2000-01-01 3.8827599999999998 2001-01-01 3.5164900000000000 2002-01-01 3.2130700000000000 2003-01-01 2.4879500000000000 2004-01-01 1.4938400000000000 2005-01-01 2.0149400000000000 2006-01-01 2.8949400000000000 2007-01-01 0.8257549999999999 2008-01-01 1.3087100000000000 2009-01-01 2.6945400000000000 2010-01-01 0.9043160000000000 2011-01-01 1.5460600000000000 2012-01-01 1.6231400000000000 2013-01-01 1.6504100000000000 2014-01-01 1.3725300000000000 2015-01-01 1.3314800000000000 2016-01-01 0.6722730000000000