Year Percent 1996-01-01 0.0000000000000000 1997-01-01 0.0000000000000000 1998-01-01 15.4810000000000000 1999-01-01 11.0904000000000000 2000-01-01 1.5051500000000000 2001-01-01 5.7815199999999995 2002-01-01 12.8091000000000000 2003-01-01 0.9205190000000001 2004-01-01 12.1234000000000000 2005-01-01 9.3637900000000000 2006-01-01 -0.3037000000000000 2007-01-01 -3.5322600000000000 2008-01-01 7.5432800000000000 2009-01-01 13.2566000000000000 2010-01-01 6.8603900000000000 2011-01-01 5.7007100000000000 2012-01-01 3.5656600000000000 2013-01-01 4.2419800000000000 2014-01-01 5.4359900000000000 2015-01-01 12.8632000000000000 2016-01-01 27.9327000000000000