Year	Percent Change
1971-01-01	0.976290869565682
1972-01-01	2.471368679227290
1973-01-01	3.540383973349960
1974-01-01	13.177305138965900
1975-01-01	8.780366536305750
1976-01-01	6.208704332709780
1977-01-01	6.858098159252520
1978-01-01	9.438000706416750
1979-01-01	13.448262113345700
1980-01-01	12.795330408132400
1981-01-01	8.446313287127820
1982-01-01	6.410071913583850
1983-01-01	0.641240739386280
1984-01-01	1.164727974915600
1985-01-01	1.874208091366280
1986-01-01	2.165384147767070
1987-01-01	-3.663462121534720
1988-01-01	-1.059957454975520
1989-01-01	4.266564172082550
1990-01-01	2.878193117492150
1991-01-01	4.894117409957320
1992-01-01	3.206666191873270
1993-01-01	0.477293054654336
1994-01-01	-2.271286863542420
1995-01-01	-3.881943966483410
1996-01-01	-0.963914529819420
1997-01-01	-0.263362507366391
1998-01-01	-1.935261697797270
1999-01-01	-1.683061675993620
2000-01-01	3.037645106543550
2001-01-01	2.596762339472490
2002-01-01	-4.890973357289790
2003-01-01	0.430404976335496
2004-01-01	-5.789408355542040
2005-01-01	1.490308465999800
2006-01-01	0.942599489042553
2007-01-01	-0.987964713253533
2008-01-01	5.097949839044060
2009-01-01	-2.974659848388290
2010-01-01	-2.948499859601780