Year	Percent Change
1971-01-01	12.790437894259800
1972-01-01	7.261139142053330
1973-01-01	15.102648703858500
1974-01-01	20.920686423230600
1975-01-01	15.779048308491900
1976-01-01	0.397627444992401
1977-01-01	2.476079384940480
1978-01-01	1.279953144397950
1979-01-01	3.976157008458800
1980-01-01	9.209833961929160
1981-01-01	10.683436774577200
1982-01-01	7.557933913420910
1983-01-01	4.521902381874090
1984-01-01	4.836201650302620
1985-01-01	4.650931400786780
1986-01-01	1.442315198659440
1987-01-01	0.611139726733328
1988-01-01	3.747207389411230
1989-01-01	3.922953019547740
1990-01-01	7.292351061996340
1991-01-01	7.573271205035310
1992-01-01	-5.755661700194820
1993-01-01	-6.947709218292520
1994-01-01	-3.139013561025780
1995-01-01	5.350634642109330
1996-01-01	0.720805155319790
1997-01-01	-4.072816020543520
1998-01-01	-2.240038362056500
1999-01-01	-2.936278881359450
2000-01-01	-5.135184997285500
2001-01-01	0.896688561580240
2002-01-01	-3.098884991075150
2003-01-01	-2.910758125949030
2004-01-01	-2.414021262604980
2005-01-01	-0.911332013252627
2006-01-01	-5.887818029564770
2007-01-01	-5.656412650896760
2008-01-01	2.721440805012060
2009-01-01	5.552302550942770
2010-01-01	-2.226879367179740