Year	Percent Change
1971-01-01	11.4164324656847000
1972-01-01	7.8166282734508100
1973-01-01	13.6867416015216000
1974-01-01	21.3081134950167000
1975-01-01	25.1574544289893000
1976-01-01	14.5733956743264000
1977-01-01	6.4155752724184100
1978-01-01	2.9856051711438100
1979-01-01	6.0000153536987700
1980-01-01	10.9350782133955000
1981-01-01	11.8885131960334000
1982-01-01	7.6572162556759000
1983-01-01	6.1046962564754100
1984-01-01	7.0906895438012100
1985-01-01	5.3840866233062100
1986-01-01	3.4121242011191400
1987-01-01	3.9109092785266800
1988-01-01	6.2811624224571500
1989-01-01	9.5966940901877100
1990-01-01	7.1014469192434000
1991-01-01	2.7631967827928600
1992-01-01	-3.4488635828368400
1993-01-01	-5.9093375814768400
1994-01-01	-3.2452563031698400
1995-01-01	3.6900546526124800
1996-01-01	0.5929855648766650
1997-01-01	-0.7404230200102900
1998-01-01	0.5631274328625700
1999-01-01	0.8193069663026010
2000-01-01	0.0237005277757530
2001-01-01	2.3142395464436600
2002-01-01	0.2498757857387020
2003-01-01	-0.0744789914076812
2004-01-01	-1.2489803050616600
2005-01-01	1.5057946083310300
2006-01-01	0.0306748187157258
2007-01-01	-0.6579816846819000
2008-01-01	5.7492961830774700
2009-01-01	5.9619160324553400
2010-01-01	-0.1394789155980870