Year	Percent Change
1971-01-01	13.755470732306200
1972-01-01	7.280893637023580
1973-01-01	14.357532800706100
1974-01-01	21.584558103231200
1975-01-01	16.767663637988100
1976-01-01	0.829322105246211
1977-01-01	1.869633595869020
1978-01-01	1.034651008845710
1979-01-01	4.510920231284840
1980-01-01	9.650872516077010
1981-01-01	10.687407458020000
1982-01-01	8.067314980963140
1983-01-01	4.373870609986550
1984-01-01	4.462905473955300
1985-01-01	4.268681050211980
1986-01-01	1.206316302208360
1987-01-01	0.338234025362484
1988-01-01	3.927626458219500
1989-01-01	4.015271802340930
1990-01-01	7.109650945652880
1991-01-01	6.721106364838590
1992-01-01	-5.428688839182630
1993-01-01	-6.995000568102380
1994-01-01	-3.135024587644090
1995-01-01	5.248879769999400
1996-01-01	0.620577206300905
1997-01-01	-3.508529544297630
1998-01-01	-1.736414646820410
1999-01-01	-2.557421418851800
2000-01-01	-4.551550234349530
2001-01-01	0.745780521099227
2002-01-01	-3.298756266843470
2003-01-01	-2.989288999929920
2004-01-01	-2.214520221466660
2005-01-01	-0.202824006210664
2006-01-01	-4.582429068455660
2007-01-01	-5.376414450369330
2008-01-01	2.852533752309420
2009-01-01	4.675752017506810
2010-01-01	-3.441487987583340