Year	Percent Change
1971-01-01	11.162733099644100
1972-01-01	7.846608108210720
1973-01-01	13.120709953828700
1974-01-01	19.939352646264100
1975-01-01	24.359560456900200
1976-01-01	14.265258679092700
1977-01-01	5.823189792771630
1978-01-01	2.571686842450940
1979-01-01	6.101831273719290
1980-01-01	10.405972799807300
1981-01-01	13.390558572004400
1982-01-01	8.027871374147100
1983-01-01	6.900244143742930
1984-01-01	7.986425935044680
1985-01-01	6.646643587134310
1986-01-01	4.627130258431810
1987-01-01	4.722067200989360
1988-01-01	5.027196858314400
1989-01-01	4.967501940647150
1990-01-01	8.281166765393970
1991-01-01	6.773784806521900
1992-01-01	-1.465477904740840
1993-01-01	-5.201830863427190
1994-01-01	-2.340355786897990
1995-01-01	2.059692894769620
1996-01-01	0.749512534685519
1997-01-01	-0.989003689921542
1998-01-01	0.710753266628470
1999-01-01	0.869269628520932
2000-01-01	0.411010229569260
2001-01-01	2.837099606236360
2002-01-01	1.465171718021450
2003-01-01	1.535356601399600
2004-01-01	0.265738461146308
2005-01-01	1.879925077390780
2006-01-01	0.805428611513759
2007-01-01	0.227667301572997
2008-01-01	5.436723914809110
2009-01-01	5.493842850387740
2010-01-01	0.585801667233568