Year	Percent
1964-01-01	2.7999999989998200
1965-01-01	0.3891050593422560
1966-01-01	1.5503875959304600
1967-01-01	2.0992366421952600
1968-01-01	1.5887850467293400
1969-01-01	3.4958601655932400
1970-01-01	0.1777777777777980
1971-01-01	4.4749999997500100
1972-01-01	4.3311797078349700
1973-01-01	16.5137614681953000
1974-01-01	21.4370078736641000
1975-01-01	34.5761063381485000
1976-01-01	31.5586605641125000
1977-01-01	11.3990111699532000
1978-01-01	-1.5836018502208300
1979-01-01	1.0815669028833600
1980-01-01	4.1692665536328900
1981-01-01	2.7989821882948800
1982-01-01	1.0210396039603500
1983-01-01	0.1914241960190450
1984-01-01	-1.5590370653420000
1985-01-01	-3.0587687291366500
1986-01-01	-3.2033314647229700
1987-01-01	-1.5471167369902000
1988-01-01	0.9075630252104970
1989-01-01	1.0326449033974100
1990-01-01	2.0771513353115800
1991-01-01	4.8611111111113900
1992-01-01	-0.0770060064690994
1993-01-01	1.0557953144269500
1994-01-01	0.5643254785331290
1995-01-01	4.8684310305603100
1996-01-01	1.2220725152335600
1997-01-01	0.0571494819969520
1998-01-01	-0.3712721349143900
1999-01-01	-1.3337528067969600
2000-01-01	-1.1250025693981100
2001-01-01	-1.1209401585589300
2002-01-01	0.2471873836454510
2003-01-01	0.6121936454014500
2004-01-01	0.5155060942808800
2005-01-01	0.4792320527100390
2006-01-01	2.2090180728652100
2007-01-01	4.1678296161156900
2008-01-01	9.8702458739980800
2009-01-01	5.0572241341404400
2010-01-01	5.3394065211472900
2011-01-01	5.8345446600844500
2012-01-01	2.8859585579176600
2013-01-01	3.5062685825996800
2014-01-01	2.6770449100186900
2015-01-01	2.1778629092747300
2016-01-01	3.4864119327991400
2017-01-01	-0.2365537204154890