Year	Percent Change
1971-01-01	8.219193393586690
1972-01-01	10.472313450996900
1973-01-01	4.137375079254330
1974-01-01	16.460362967101200
1975-01-01	19.052387298986900
1976-01-01	13.909892757016500
1977-01-01	12.726033226634100
1978-01-01	7.030131049519310
1979-01-01	4.055331887600750
1980-01-01	9.266235958205870
1981-01-01	3.284719674685650
1982-01-01	5.569867873366750
1983-01-01	7.950326990103180
1984-01-01	5.872052197670420
1985-01-01	4.795492918439800
1986-01-01	5.622212751343540
1987-01-01	3.212671410863590
1988-01-01	-0.548830632139879
1989-01-01	3.985562082398970
1990-01-01	5.972543017499820
1991-01-01	9.997333344805370
1992-01-01	2.680245497288750
1993-01-01	4.824648364742850
1994-01-01	-1.044275226948100
1995-01-01	-0.559998173243883
1996-01-01	1.959769976567480
1997-01-01	1.853731390650450
1998-01-01	2.114696599026760
1999-01-01	2.419162106527610
2000-01-01	3.103799950366160
2001-01-01	3.967359718303640
2002-01-01	0.556580506003864
2003-01-01	-0.128819324985206
2004-01-01	0.230456846687161
2005-01-01	1.188773872066480
2006-01-01	2.455184819916440
2007-01-01	2.536767315098560
2008-01-01	3.883704929925820
2009-01-01	5.013036901437220
2010-01-01	-0.480021030954963