Year	Percent
1960-01-01	4.4600
1961-01-01	3.0000
1962-01-01	3.4200
1963-01-01	2.9300
1964-01-01	3.3300
1965-01-01	4.6700
1966-01-01	5.8500
1967-01-01	2.7700
1968-01-01	1.9400
1969-01-01	8.3500
1970-01-01	7.4700
1971-01-01	5.7700
1972-01-01	6.6900
1973-01-01	11.8900
1974-01-01	8.3500
1975-01-01	3.9200
1976-01-01	5.0300
1977-01-01	3.2400
1978-01-01	3.5600
1979-01-01	9.0200
1980-01-01	9.1600
1981-01-01	10.5800
1982-01-01	6.1500
1983-01-01	5.6100
1984-01-01	5.6200
1985-01-01	4.6400
1986-01-01	5.0000
1987-01-01	3.1900
1988-01-01	4.8900
1989-01-01	7.6700
1990-01-01	8.4300
1991-01-01	9.2300
1992-01-01	8.9100
1993-01-01	6.1900
1994-01-01	4.9000
1995-01-01	4.0800
1996-01-01	3.1100
1997-01-01	3.4400
1998-01-01	3.1400
1999-01-01	3.0418
2000-01-01	4.8268
2001-01-01	3.3389
2002-01-01	3.0945
2003-01-01	2.0567
2004-01-01	2.0535
2005-01-01	2.2757
2006-01-01	3.5011
2007-01-01	3.8791
2008-01-01	2.4864
2009-01-01	0.3546
2010-01-01	0.4981
2011-01-01	0.6270
2012-01-01	0.0734
2013-01-01	0.1686
2014-01-01	-0.0301
2015-01-01	-0.1990
2016-01-01	-0.3504
2017-01-01	-0.3423