Year	Percent
1967-01-01	3.6348751533575700
1968-01-01	7.4887431868761900
1969-01-01	5.8352318660549100
1970-01-01	7.2842163736852300
1971-01-01	7.4692556635386200
1972-01-01	11.8766562275328000
1973-01-01	16.8550818260213000
1974-01-01	38.9229280878111000
1975-01-01	20.2944687625289000
1976-01-01	4.9867681111318300
1977-01-01	8.3523696993499700
1978-01-01	9.4823825910176300
1979-01-01	13.1698355431799000
1980-01-01	14.4305197203942000
1981-01-01	14.5675632146886000
1982-01-01	10.3324664370561000
1983-01-01	5.2302987828884000
1984-01-01	4.6857973118559900
1985-01-01	3.9151052508279400
1986-01-01	1.3300684516191400
1987-01-01	3.3117311074325400
1988-01-01	4.8588591781404800
1989-01-01	6.1901140684412000
1990-01-01	3.0745727107801900
1991-01-01	6.2575266327002000
1992-01-01	6.0938930299464100
1993-01-01	1.1134393360448300
1994-01-01	0.0772043884602162
1995-01-01	1.8788627935723200
1996-01-01	2.3861522284232300
1997-01-01	7.7105387896988400
1998-01-01	-1.2688866070121200
1999-01-01	1.5600624024960600
2000-01-01	2.4358130348913800
2001-01-01	2.5778349043128900
2002-01-01	0.1252494580559940
2003-01-01	1.6194331983805600
2004-01-01	1.3944223107568900
2005-01-01	6.0821872953504300
2006-01-01	7.3076626282894100
2007-01-01	4.0342298288506900
2008-01-01	8.1081081081078000
2009-01-01	3.6438618925833800
2010-01-01	5.8242185331186500
2011-01-01	9.4322024017721600
2012-01-01	4.5333475388877100
2013-01-01	1.8141043604910100
2014-01-01	1.7695032208972600
2015-01-01	-1.1127899251096100
2016-01-01	1.2819281306189400
2017-01-01	4.6601846395599700