Year	Percent
1971-01-01	0.062874000000000000
1972-01-01	0.550953999999999900
1973-01-01	0.136671000000000010
1974-01-01	0.152223000000000000
1975-01-01	0.340956000000000000
1976-01-01	0.529435000000000000
1977-01-01	0.470028000000000000
1978-01-01	0.226961000000000020
1979-01-01	0.069636000000000000
1980-01-01	0.108255999999999990
1981-01-01	0.319986000000000000
1982-01-01	0.412164000000000030
1983-01-01	1.362029999999999900
1984-01-01	1.164030000000000000
1985-01-01	-0.019150999999999998
1986-01-01	2.039080000000000000
1987-01-01	0.201071000000000000
1988-01-01	-0.431836999999999970
1989-01-01	0.721471000000000000
1990-01-01	-0.328397000000000000
1991-01-01	-1.481060000000000000
1992-01-01	-0.065396000000000010
1993-01-01	-0.113132000000000000
1994-01-01	-0.330425000000000000
1995-01-01	-0.152427000000000000
1996-01-01	0.168414000000000000
1997-01-01	-0.269106000000000000
1998-01-01	-0.601156999999999900
1999-01-01	-0.112943000000000000
2000-01-01	0.322248999999999950
2001-01-01	-0.162630000000000000
2002-01-01	-0.208805000000000020
2003-01-01	0.395696999999999970
2004-01-01	0.904632000000000000
2005-01-01	1.848240000000000000
2006-01-01	1.462079999999999800
2007-01-01	-0.283010000000000000
2008-01-01	1.975029999999999800
2009-01-01	0.056033000000000006
2010-01-01	-0.420814000000000000
2011-01-01	-2.052020000000000000
2012-01-01	1.650320000000000000
2013-01-01	0.142323000000000000
2014-01-01	0.605393000000000100
2015-01-01	-0.339199000000000000
2016-01-01	-0.877811000000000000