Year Percent 1996-01-01 17.340000000000000 1997-01-01 9.139040000000000 1998-01-01 -6.481110000000000 1999-01-01 36.608000000000004 2000-01-01 32.573000000000000 2001-01-01 13.996500000000000 2002-01-01 8.518340000000000 2003-01-01 12.976400000000000 2004-01-01 12.838600000000000 2005-01-01 16.146900000000000 2006-01-01 16.243000000000000 2007-01-01 15.554000000000000 2008-01-01 13.941200000000000 2009-01-01 5.373350000000000 2010-01-01 3.843110000000000 2011-01-01 8.378689999999999 2012-01-01 10.647400000000000 2013-01-01 11.673800000000000 2014-01-01 8.679510000000000 2015-01-01 8.679510000000000 2016-01-01 5.929490000000000