Year	Percent Change
1971-01-01	4.167842813743160
1972-01-01	5.129726164735860
1973-01-01	6.555305424616870
1974-01-01	15.134586611495900
1975-01-01	15.208214084284500
1976-01-01	9.240169384358160
1977-01-01	6.488791600668740
1978-01-01	5.243867330759090
1979-01-01	7.863703092792070
1980-01-01	10.097937183284800
1981-01-01	12.020839132315600
1982-01-01	10.035677195198400
1983-01-01	2.471734086526460
1984-01-01	2.390037607583200
1985-01-01	3.462353419693920
1986-01-01	2.673797115629150
1987-01-01	4.331992623338410
1988-01-01	4.835570932899060
1989-01-01	5.414340108688520
1990-01-01	4.906686921851950
1991-01-01	4.540250266334070
1992-01-01	1.686165608444400
1993-01-01	-0.212466663382066
1994-01-01	-1.581592716055670
1995-01-01	0.314303138854078
1996-01-01	1.630765491204200
1997-01-01	1.669243406248040
1998-01-01	1.087371761932740
1999-01-01	-0.322531596127821
2000-01-01	1.970033415325130
2001-01-01	2.176635758412510
2002-01-01	1.093602995147300
2003-01-01	2.535830283510230
2004-01-01	2.278656243064990
2005-01-01	2.330972975882260
2006-01-01	3.781002554788540
2007-01-01	3.473161853183000
2008-01-01	3.216584108720990
2009-01-01	2.691886684495870
2010-01-01	0.865069194267755