Year	Percent
1972-01-01	0.203993000000000000
1973-01-01	0.203283000000000000
1974-01-01	0.841164999999999900
1975-01-01	0.047430000000000000
1976-01-01	0.761174000000000000
1977-01-01	0.455906000000000030
1978-01-01	0.502802000000000100
1979-01-01	0.104142000000000010
1980-01-01	0.409462000000000000
1981-01-01	0.581410000000000000
1982-01-01	0.124868000000000000
1983-01-01	-0.112311000000000000
1984-01-01	0.276530000000000000
1985-01-01	-0.158532000000000000
1986-01-01	0.144392000000000020
1987-01-01	0.662809000000000000
1988-01-01	0.120745000000000000
1989-01-01	0.612295000000000000
1990-01-01	0.347823999999999970
1991-01-01	0.601286000000000000
1992-01-01	0.071766000000000000
1993-01-01	0.765313000000000000
1994-01-01	1.113320000000000000
1995-01-01	0.445986999999999970
1996-01-01	0.042149000000000000
1997-01-01	-0.471356000000000050
1998-01-01	1.407040000000000000
1999-01-01	0.623890000000000000
2000-01-01	-0.907520999999999900
2001-01-01	1.913980000000000000
2002-01-01	-0.041710000000000004
2003-01-01	0.950722000000000000
2004-01-01	-0.312724000000000000
2005-01-01	1.190600000000000000
2006-01-01	3.067280000000000000
2007-01-01	-3.244990000000000000
2008-01-01	2.386740000000000000
2009-01-01	-1.884690000000000200
2010-01-01	-1.525160000000000000
2011-01-01	-2.012660000000000000
2012-01-01	-0.425473999999999960
2013-01-01	-0.978912999999999900
2014-01-01	1.173150000000000000
2015-01-01	-1.403950000000000000
2016-01-01	0.574974000000000000