Year	Percent Change
1971-01-01	6.046557260512220
1972-01-01	3.913723455295390
1973-01-01	7.169301255057210
1974-01-01	13.900806679207500
1975-01-01	17.962937009227400
1976-01-01	7.649497914560940
1977-01-01	8.537726161385190
1978-01-01	8.618916462244670
1979-01-01	10.474764304494800
1980-01-01	10.968323595910000
1981-01-01	11.535049585960200
1982-01-01	11.021539219497900
1983-01-01	7.105897427707610
1984-01-01	6.570256096691900
1985-01-01	3.927554360757300
1986-01-01	3.496428050196880
1987-01-01	2.130344439683930
1988-01-01	-0.624071546831174
1989-01-01	0.953614372498585
1990-01-01	2.220109801365050
1991-01-01	2.308486428351920
1992-01-01	2.703233525883000
1993-01-01	1.405768616940400
1994-01-01	-1.885527169934780
1995-01-01	-1.351757329792490
1996-01-01	0.606511365418841
1997-01-01	-1.923375152968440
1998-01-01	-3.666332509698120
1999-01-01	-1.642962664241350
2000-01-01	-1.236006882883060
2001-01-01	0.191666472356062
2002-01-01	0.695327509249245
2003-01-01	-1.531473180358750
2004-01-01	-0.105688267184448
2005-01-01	-0.157718827441406
2006-01-01	1.165342041021080
2007-01-01	1.171312682039150
2008-01-01	2.365001264938530
2009-01-01	2.630248103066570
2010-01-01	0.959779493866144