Year	Percent Change
1971-01-01	4.657463554958810
1972-01-01	6.716743034636040
1973-01-01	6.517796597306720
1974-01-01	12.777265310838400
1975-01-01	18.375396078267500
1976-01-01	8.338759363612640
1977-01-01	10.041416708001400
1978-01-01	10.073567302680300
1979-01-01	9.217287441854630
1980-01-01	11.026198976470700
1981-01-01	11.811270074714400
1982-01-01	10.370375111458100
1983-01-01	8.608583771951900
1984-01-01	3.402348847116700
1985-01-01	7.565639699405850
1986-01-01	0.727785904000999
1987-01-01	2.624403537091080
1988-01-01	0.922244286812829
1989-01-01	-0.604114851248326
1990-01-01	1.354957883104360
1991-01-01	0.792777393545547
1992-01-01	2.817272998009620
1993-01-01	1.109208888162400
1994-01-01	-2.303500412609630
1995-01-01	-1.077678234728010
1996-01-01	0.398383228131930
1997-01-01	-3.940323120329700
1998-01-01	-2.568797451948960
1999-01-01	-0.663221496337450
2000-01-01	1.146817797879950
2001-01-01	1.126553956420490
2002-01-01	2.776230755164400
2003-01-01	2.946393362746720
2004-01-01	2.175018081030050
2005-01-01	1.526534110255660
2006-01-01	0.318265503728887
2007-01-01	-0.589507749306990
2008-01-01	2.724599699822440
2009-01-01	4.655669789666140
2010-01-01	-1.914568408772900