Year Percent 1996-01-01 6.8879100000000010 1997-01-01 7.9599699999999990 1998-01-01 11.4547000000000000 1999-01-01 10.9382000000000000 2000-01-01 5.6128000000000000 2001-01-01 7.2969600000000000 2002-01-01 7.1348699999999990 2003-01-01 6.8162100000000010 2004-01-01 22.0197000000000000 2005-01-01 9.1840700000000000 2006-01-01 14.9317000000000000 2007-01-01 16.4065000000000000 2008-01-01 12.8390000000000000 2009-01-01 9.9727400000000000 2010-01-01 7.8667300000000004 2011-01-01 1.2119200000000000 2012-01-01 -9.0148900000000000 2013-01-01 1.9353200000000002 2014-01-01 4.0035400000000000 2015-01-01 4.6380800000000000 2016-01-01 2.2620000000000000