Year	Percent Change
1971-01-01	5.176831621725970
1972-01-01	6.365385864546840
1973-01-01	6.969285837834620
1974-01-01	14.446416196924100
1975-01-01	17.829677286079000
1976-01-01	10.534682751947500
1977-01-01	8.123189526965900
1978-01-01	10.318058262696200
1979-01-01	10.162662078394400
1980-01-01	11.226033559435600
1981-01-01	11.841570959086000
1982-01-01	11.812252669045400
1983-01-01	9.258757576946540
1984-01-01	4.693306178623240
1985-01-01	6.692846542861960
1986-01-01	2.028046822280130
1987-01-01	3.498129896302040
1988-01-01	2.707216376147310
1989-01-01	1.443265628368600
1990-01-01	5.789101375199940
1991-01-01	2.701080871337840
1992-01-01	2.529422580240960
1993-01-01	1.169612728725720
1994-01-01	-0.854359828384887
1995-01-01	0.545008858688762
1996-01-01	0.568817260051431
1997-01-01	-1.078809115183900
1998-01-01	0.419179341639293
1999-01-01	1.342753447952460
2000-01-01	2.165863333858060
2001-01-01	3.328646024057870
2002-01-01	2.742860497767120
2003-01-01	1.577617494313620
2004-01-01	1.603542010039360
2005-01-01	1.808953027407480
2006-01-01	1.914507480005990
2007-01-01	1.022088022653690
2008-01-01	2.717327169342940
2009-01-01	1.904739493342180
2010-01-01	0.670107445512309