Year	Percent Change
1971-01-01	8.604891494025170
1972-01-01	5.876436293067560
1973-01-01	7.365924805519100
1974-01-01	8.890649139327030
1975-01-01	5.711416314392540
1976-01-01	2.301092321509920
1977-01-01	3.305601698832660
1978-01-01	3.347069028982460
1979-01-01	4.890602093445200
1980-01-01	5.670715217826420
1981-01-01	3.807622819913100
1982-01-01	3.299075871023440
1983-01-01	1.153912923430920
1984-01-01	0.591926691028458
1985-01-01	1.275567926718120
1986-01-01	2.764607865272980
1987-01-01	2.756676890419390
1988-01-01	0.331069429398116
1989-01-01	0.410255142930869
1990-01-01	2.278957631793020
1991-01-01	5.296103712399920
1992-01-01	7.229626047624530
1993-01-01	4.120933330477840
1994-01-01	0.930085912876380
1995-01-01	1.961066170471540
1996-01-01	0.350572036694893
1997-01-01	-1.439459754988770
1998-01-01	0.204805414756090
1999-01-01	0.880438036478917
2000-01-01	0.012925479911547
2001-01-01	0.214769267778832
2002-01-01	0.280478861520366
2003-01-01	0.555778733631793
2004-01-01	-0.686957639593188
2005-01-01	-1.209151142798030
2006-01-01	-2.356209363443250
2007-01-01	-1.567382875874590
2008-01-01	1.328468759809620
2009-01-01	3.033175798635110
2010-01-01	1.352829894133860