Year	Percent Change
1971-01-01	10.531107951069300
1972-01-01	5.118942246692140
1973-01-01	12.707878852118900
1974-01-01	18.429288437360800
1975-01-01	27.819201448656700
1976-01-01	12.890532830833100
1977-01-01	18.114113450593000
1978-01-01	11.264550903525000
1979-01-01	13.207911341444900
1980-01-01	17.762010565413900
1981-01-01	19.576176878841000
1982-01-01	17.315514931027400
1983-01-01	14.716521737056600
1984-01-01	8.882926033265430
1985-01-01	8.100769519138390
1986-01-01	5.898997565140290
1987-01-01	4.419798145548660
1988-01-01	4.657854627015870
1989-01-01	6.165782162039710
1990-01-01	8.185426839121820
1991-01-01	8.091032103331050
1992-01-01	5.516204911668620
1993-01-01	1.170228194530780
1994-01-01	-0.937414349272693
1995-01-01	1.279754222265450
1996-01-01	4.231865031359860
1997-01-01	2.228437097486280
1998-01-01	-0.270291934903971
1999-01-01	2.641681957179280
2000-01-01	-1.002394483211860
2001-01-01	2.122714778481360
2002-01-01	3.558201023346460
2003-01-01	4.480135051325590
2004-01-01	1.982483591937780
2005-01-01	2.809388258711770
2006-01-01	1.423904645528990
2007-01-01	2.735921692778480
2008-01-01	5.490088038386060
2009-01-01	4.464631023305950
2010-01-01	-0.381804122374352