Year	Percent Change
1971-01-01	8.3251605791240800
1972-01-01	7.7219777171747900
1973-01-01	4.2371718408942700
1974-01-01	15.9155087725314000
1975-01-01	13.3561130031717000
1976-01-01	13.6851518782613000
1977-01-01	7.5358605088038100
1978-01-01	3.7665107941101500
1979-01-01	2.2666672256935800
1980-01-01	6.9870248027669400
1981-01-01	5.1320896729640900
1982-01-01	5.4031329105137500
1983-01-01	4.5318365295689500
1984-01-01	4.1096776320499800
1985-01-01	3.8975928130508100
1986-01-01	3.3065638862070800
1987-01-01	2.1305658007407600
1988-01-01	-0.2606615134390630
1989-01-01	3.2493290095404000
1990-01-01	4.9297438255377300
1991-01-01	7.7697913638586400
1992-01-01	5.8666846167164100
1993-01-01	2.7214164364754400
1994-01-01	0.7296034920039030
1995-01-01	0.1462013903432440
1996-01-01	-0.3446395570348330
1997-01-01	-0.4448202215627340
1998-01-01	1.1165847171982000
1999-01-01	2.2477810020090400
2000-01-01	0.9111051725267090
2001-01-01	3.7064759146634300
2002-01-01	1.1022354802029000
2003-01-01	0.0280164918010301
2004-01-01	-0.4038692144216620
2005-01-01	0.6525583706682800
2006-01-01	1.8609041002135700
2007-01-01	2.2886766825788300
2008-01-01	2.9329402006019700
2009-01-01	3.7411311784516800
2010-01-01	0.4555923319894870