Year	Percent Change
1971-01-01	12.165445706141300
1972-01-01	8.666344074505100
1973-01-01	13.680863149844000
1974-01-01	11.484529456532700
1975-01-01	24.382842016286000
1976-01-01	20.274237452787000
1977-01-01	4.678151778492240
1978-01-01	8.563502440186580
1979-01-01	20.126354564054200
1980-01-01	22.409119377355500
1981-01-01	17.148852288974500
1982-01-01	12.564334233582900
1983-01-01	9.403523681772510
1984-01-01	3.448487502108890
1985-01-01	2.525075415607540
1986-01-01	8.019063767696360
1987-01-01	0.242936370198075
1988-01-01	-0.941009127663823
1989-01-01	1.160397028113080
1990-01-01	-0.721938916586208
1991-01-01	3.757197861241790
1992-01-01	4.661797441101880
1993-01-01	3.870205139136820
1994-01-01	1.990953619308790
1995-01-01	-0.851676736245186
1996-01-01	-0.394376036218774
1997-01-01	0.034036812287382
1998-01-01	4.849851087379730
1999-01-01	1.274449384513530
2000-01-01	1.439865584039730
2001-01-01	3.497303310616460
2002-01-01	0.880506316362222
2003-01-01	4.004428479027910
2004-01-01	3.736129220412590
2005-01-01	5.523684669979540
2006-01-01	3.812066344979260
2007-01-01	3.767966849435520
2008-01-01	3.857546902426830
2009-01-01	-3.090903593057140
2010-01-01	-5.114292945587420