Year	Percent
1971-01-01	0.382876000000000000
1972-01-01	0.447331999999999950
1973-01-01	0.447331999999999950
1974-01-01	0.241281000000000000
1975-01-01	0.294969999999999950
1976-01-01	0.567876000000000000
1977-01-01	0.554815000000000000
1978-01-01	0.666977000000000000
1979-01-01	0.368554000000000000
1980-01-01	-0.014902000000000000
1981-01-01	0.390584000000000040
1982-01-01	0.276346999999999950
1983-01-01	-0.050966000000000004
1984-01-01	0.245623999999999980
1985-01-01	-0.259326000000000000
1986-01-01	0.218790000000000000
1987-01-01	0.719102000000000000
1988-01-01	0.516942000000000000
1989-01-01	0.278840000000000030
1990-01-01	1.346830000000000000
1991-01-01	1.227060000000000000
1992-01-01	2.885670000000000000
1993-01-01	-1.201039999999999900
1994-01-01	-0.006775000000000000
1995-01-01	-1.008200000000000000
1996-01-01	0.719155000000000000
1997-01-01	-1.112490000000000000
1998-01-01	-1.496230000000000000
1999-01-01	0.044370000000000000
2000-01-01	-0.898519000000000100
2001-01-01	-0.041006000000000000
2002-01-01	0.555345000000000000
2003-01-01	-1.262050000000000000
2004-01-01	0.661185000000000000
2005-01-01	0.503336000000000000
2006-01-01	0.215652000000000000
2007-01-01	-1.001229999999999800
2008-01-01	0.923372000000000000
2009-01-01	1.007960000000000000
2010-01-01	1.723570000000000000
2011-01-01	0.078561000000000000
2012-01-01	1.545729999999999800
2013-01-01	1.479000000000000000
2014-01-01	0.404242000000000000
2015-01-01	-0.560945000000000000
2016-01-01	1.778550000000000000