Year	Percent Change
1971-01-01	16.7309692229620000
1972-01-01	7.6390857729467500
1973-01-01	14.0874881654795000
1974-01-01	34.8050844896391000
1975-01-01	20.4185701867081000
1976-01-01	11.3617313903303000
1977-01-01	19.2182862355523000
1978-01-01	32.4452524892834000
1979-01-01	31.7294294827320000
1980-01-01	37.1748175714095000
1981-01-01	25.6852117037464000
1982-01-01	14.0868997232604000
1983-01-01	7.6717108850945200
1984-01-01	2.2432473078640900
1985-01-01	2.5681968863764600
1986-01-01	8.0524528960084200
1987-01-01	-0.4980947589879810
1988-01-01	9.1122704642291600
1989-01-01	16.3441800796607000
1990-01-01	13.3327616427227000
1991-01-01	18.0710102809586000
1992-01-01	8.3859084373941400
1993-01-01	3.9780297281296700
1994-01-01	10.9881751854917000
1995-01-01	10.4310502985541000
1996-01-01	7.8749372558991600
1997-01-01	0.0120598158534118
1998-01-01	3.3087867514368600
1999-01-01	-5.5341144162607300
2000-01-01	6.5527514916598300
2001-01-01	6.7034297183518000
2002-01-01	-0.6828582912137180
2003-01-01	2.2001268917382900
2004-01-01	3.5364884603115200
2005-01-01	4.8104407368610700
2006-01-01	3.0400790450402000
2007-01-01	2.3721255540040200
2008-01-01	3.0417358942276200
2009-01-01	0.4902185385155680
2010-01-01	2.2229665336392800