Year	Percent Change
1971-01-01	10.122259135669000
1972-01-01	5.222764717181010
1973-01-01	14.224225567489300
1974-01-01	26.062423005836300
1975-01-01	11.686268459415600
1976-01-01	6.367572354095740
1977-01-01	7.517800833426280
1978-01-01	3.308444241763740
1979-01-01	0.815100413171095
1980-01-01	3.287136444995330
1981-01-01	4.552140151025990
1982-01-01	3.096380031807550
1983-01-01	2.404514728795360
1984-01-01	0.647874037324708
1985-01-01	-2.942436900294820
1986-01-01	1.743387726913840
1987-01-01	-1.559501218651090
1988-01-01	-1.388416740032030
1989-01-01	1.136548944226900
1990-01-01	-0.639102613501708
1991-01-01	1.957748074505530
1992-01-01	1.677578226379750
1993-01-01	1.194366092013110
1994-01-01	1.346616608862150
1995-01-01	-1.598244116749210
1996-01-01	-2.692495230632080
1997-01-01	-0.582550554481041
1998-01-01	-0.271664401891726
1999-01-01	-3.134993280529780
2000-01-01	-2.525629654181390
2001-01-01	-2.088945252699620
2002-01-01	-4.017806045294220
2003-01-01	-4.603498825487340
2004-01-01	-4.124466542068650
2005-01-01	-3.274252822299000
2006-01-01	-0.612052011780129
2007-01-01	-2.001588412911280
2008-01-01	-0.787298534337631
2009-01-01	1.511853703541060
2010-01-01	1.615670793143410