Year	Percent
1965-01-01	8.47186932846468
1966-01-01	14.38897068686560
1967-01-01	-2.80833138334688
1968-01-01	1.17986997370045
1969-01-01	4.05759162281558
1970-01-01	15.23727844503590
1971-01-01	-1.99950384520828
1972-01-01	8.38902389630180
1973-01-01	11.42977252586000
1974-01-01	19.80633802808490
1975-01-01	7.58598521352967
1976-01-01	-3.11323573327195
1977-01-01	9.89885284313485
1978-01-01	7.34609125083294
1979-01-01	3.56545378520239
1980-01-01	14.68450277637680
1981-01-01	11.14485672784430
1982-01-01	11.69854659241390
1983-01-01	12.37723807827130
1984-01-01	2.84578495716263
1985-01-01	8.05264126619630
1986-01-01	18.99894955023950
1987-01-01	10.75032804498500
1988-01-01	8.98300338208987
1989-01-01	8.84688691232553
1990-01-01	8.23970037453210
1991-01-01	15.55745292769480
1992-01-01	17.14952362434400
1993-01-01	7.50539419087102
1994-01-01	8.34928672883387
1995-01-01	7.62296950698166
1996-01-01	9.22046662376983
1997-01-01	4.00998860523182
1998-01-01	11.24446778186140
1999-01-01	7.45111260957550
2000-01-01	2.47882020709133
2001-01-01	2.68830373545630
2002-01-01	3.02939948714895
2003-01-01	5.70700931874738
2004-01-01	2.84181131248977
2005-01-01	6.83633265892876
2006-01-01	6.92033580707588
2007-01-01	2.26921924439076
2008-01-01	9.90783005306480
2009-01-01	11.09482373869870
2010-01-01	9.32650410745393
2011-01-01	9.22707546125953
2012-01-01	9.45980980357129
2013-01-01	9.04016311917647
2014-01-01	8.36415469659556
2015-01-01	7.86890895590905
2016-01-01	8.79034332004629
2017-01-01	3.22892812292236