Year	Percent
1997-01-01	0.08099200000000000
1998-01-01	0.28978000000000004
1999-01-01	0.27753800000000000
2000-01-01	0.41470600000000000
2001-01-01	0.43191999999999997
2002-01-01	0.41159399999999996
2003-01-01	0.38574899999999995
2004-01-01	0.50720500000000000
2005-01-01	0.42869399999999996
2006-01-01	0.67702000000000000
2007-01-01	0.18436200000000000
2008-01-01	-0.30003500000000000
2009-01-01	0.18839000000000000
2010-01-01	0.29864400000000000
2011-01-01	0.10613900000000001
2012-01-01	0.28189699999999995
2013-01-01	0.34336700000000003
2014-01-01	0.07102500000000000
2015-01-01	0.30767200000000000
2016-01-01	0.40799500000000000