Year	Percent
1970-01-01	0.011479000000000001
1971-01-01	0.081019000000000010
1972-01-01	0.109433999999999990
1973-01-01	0.122054000000000000
1974-01-01	0.046087000000000000
1975-01-01	0.044259000000000000
1976-01-01	0.122520000000000000
1977-01-01	0.096173000000000010
1978-01-01	-0.008634000000000001
1979-01-01	0.086562000000000000
1980-01-01	0.033277000000000000
1981-01-01	0.109105000000000000
1982-01-01	0.184060000000000000
1983-01-01	0.182591000000000000
1984-01-01	0.327636000000000040
1985-01-01	0.674862000000000000
1986-01-01	0.046221000000000000
1987-01-01	0.093671000000000000
1988-01-01	-0.086472000000000010
1989-01-01	0.395734000000000030
1990-01-01	0.363164000000000000
1991-01-01	0.322192000000000030
1992-01-01	0.791839000000000100
1993-01-01	0.416624000000000000
1994-01-01	0.249630000000000020
1995-01-01	0.319723000000000000
1996-01-01	1.355279999999999800
1997-01-01	0.882843000000000000
1998-01-01	0.420138000000000000
1999-01-01	1.810070000000000000
2000-01-01	1.613150000000000000
2001-01-01	1.022689999999999900
2002-01-01	1.020130000000000000
2003-01-01	2.913170000000000000
2004-01-01	2.516390000000000300
2005-01-01	3.148920000000000000
2006-01-01	5.177720000000000000
2007-01-01	1.427779999999999800
2008-01-01	10.238000000000000000
2009-01-01	0.114276000000000000
2010-01-01	-1.509360000000000000
2011-01-01	-1.050620000000000000
2012-01-01	-0.188010999999999980
2013-01-01	0.005548000000000000
2014-01-01	-0.783207000000000000
2015-01-01	-0.783589000000000000
2016-01-01	0.503347999999999900