Year	Percent
1967-01-01	0.0008119999999999999
1968-01-01	0.0075330000000000000
1969-01-01	0.0056869999999999990
1970-01-01	0.0018590000000000000
1971-01-01	0.0188389999999999980
1972-01-01	0.0491250000000000000
1973-01-01	0.0261100000000000000
1974-01-01	0.0048420000000000000
1975-01-01	0.0178810000000000000
1976-01-01	0.0242330000000000000
1977-01-01	0.0116969999999999990
1978-01-01	0.0157430000000000000
1979-01-01	0.0575200000000000000
1980-01-01	0.0508650000000000000
1981-01-01	0.0508570000000000000
1982-01-01	0.0423620000000000040
1983-01-01	0.0568700000000000040
1984-01-01	0.1991240000000000000
1985-01-01	0.1812630000000000000
1986-01-01	0.1277080000000000000
1987-01-01	-0.0481500000000000000
1988-01-01	0.0425690000000000000
1989-01-01	-0.0183820000000000000
1990-01-01	0.0385810000000000000
1991-01-01	-0.0375600000000000000
1992-01-01	-0.0024160000000000000
1993-01-01	0.0784740000000000000
1994-01-01	0.0436600000000000040
1995-01-01	0.1790430000000000000
1996-01-01	0.3967190000000000000
1997-01-01	0.1695300000000000000
1998-01-01	0.3128120000000000000
1999-01-01	0.3615500000000000000
2000-01-01	0.9895690000000000000
2001-01-01	1.1346700000000000000
2002-01-01	0.2775220000000000000
2003-01-01	0.4565070000000000000
2004-01-01	0.3044580000000000000
2005-01-01	0.4754260000000000000
2006-01-01	1.2083600000000000000
2007-01-01	0.4639979999999999700
2008-01-01	-0.4071860000000000000
2009-01-01	-0.0010130000000000000
2010-01-01	-0.1133760000000000000
2011-01-01	-0.2662920000000000300
2012-01-01	0.0965200000000000100
2013-01-01	0.2339270000000000000
2014-01-01	0.2304389999999999800
2015-01-01	0.0748870000000000000
2016-01-01	0.1547640000000000000