Year	Percent Change
1971-01-01	8.946868763759190
1972-01-01	4.564385486347610
1973-01-01	3.284740829530300
1974-01-01	20.657291104737900
1975-01-01	19.547747671480900
1976-01-01	8.244478099065400
1977-01-01	7.303257726267730
1978-01-01	0.289594066023848
1979-01-01	2.360317888295920
1980-01-01	5.776737374293940
1981-01-01	9.697565767835740
1982-01-01	5.551368354687140
1983-01-01	5.156850326377900
1984-01-01	3.458159468824200
1985-01-01	2.749857224601410
1986-01-01	-2.184092348062410
1987-01-01	1.544645374069960
1988-01-01	-2.372580464384650
1989-01-01	2.533989734334510
1990-01-01	3.240772825227600
1991-01-01	1.868205005059390
1992-01-01	5.451086956862580
1993-01-01	2.411495696795930
1994-01-01	1.734394355910500
1995-01-01	2.371177011786910
1996-01-01	2.645195045598600
1997-01-01	0.675910156613938
1998-01-01	-0.906487606745823
1999-01-01	-0.535604411836738
2000-01-01	5.267301497290030
2001-01-01	5.641907990647070
2002-01-01	2.401337166526230
2003-01-01	1.542387357188070
2004-01-01	1.191206090010560
2005-01-01	2.215513012935870
2006-01-01	1.125935997111420
2007-01-01	1.002063414553240
2008-01-01	6.585073441714740
2009-01-01	8.120665642784130
2010-01-01	1.891982550700540