Year	Percent Change
1971-01-01	5.935458742277980
1972-01-01	5.580993939771390
1973-01-01	2.463938594556710
1974-01-01	13.968481776333600
1975-01-01	20.156201133063800
1976-01-01	15.824282389889200
1977-01-01	10.079281233145100
1978-01-01	9.533869638818360
1979-01-01	0.565585589277135
1980-01-01	9.282143978568080
1981-01-01	9.908908772917290
1982-01-01	4.295601769636810
1983-01-01	0.968160656723024
1984-01-01	2.334726375302050
1985-01-01	7.355379250220200
1986-01-01	5.287546901041330
1987-01-01	4.254861680361280
1988-01-01	7.049699725181920
1989-01-01	8.456506570082350
1990-01-01	7.679527384831650
1991-01-01	6.882949217724620
1992-01-01	-0.435885994806998
1993-01-01	-5.968675526114520
1994-01-01	-4.683283642108520
1995-01-01	-1.862806279944990
1996-01-01	4.367007886973800
1997-01-01	-3.258112421941130
1998-01-01	-3.270642560920420
1999-01-01	-6.071152117352950
2000-01-01	-0.304352186327975
2001-01-01	5.866652611342490
2002-01-01	-4.502309242421330
2003-01-01	-2.463818489306810
2004-01-01	-6.478057668481360
2005-01-01	-3.090724197838920
2006-01-01	-2.623003521489510
2007-01-01	2.749115249768160
2008-01-01	6.887548962542970
2009-01-01	9.179136520553280
2010-01-01	-11.574822379967100