Year	Percent Change
1971-01-01	8.932068182105880
1972-01-01	12.090836734151400
1973-01-01	12.725513615209000
1974-01-01	23.311895000411900
1975-01-01	17.713849827581300
1976-01-01	17.464483331590200
1977-01-01	17.604084066562500
1978-01-01	23.688915043005900
1979-01-01	24.271550504476500
1980-01-01	22.501117302419300
1981-01-01	17.391791131161800
1982-01-01	6.550728313004320
1983-01-01	8.514928354295240
1984-01-01	3.142431399456550
1985-01-01	2.097149512636380
1986-01-01	2.772925862445050
1987-01-01	4.349395026147150
1988-01-01	9.860681102622730
1989-01-01	5.706530726244840
1990-01-01	8.858293962621770
1991-01-01	13.554710037544800
1992-01-01	8.413388352332300
1993-01-01	6.789247382241010
1994-01-01	7.041469039691960
1995-01-01	9.197672098645490
1996-01-01	7.686023670312120
1997-01-01	-0.673450652800653
1998-01-01	-0.774208343007594
1999-01-01	-4.541232942330250
2000-01-01	-1.642045763456980
2001-01-01	3.689838190612300
2002-01-01	1.947185403491210
2003-01-01	5.212426693278680
2004-01-01	0.358252036028445
2005-01-01	0.862698011385353
2006-01-01	-0.950060755081606
2007-01-01	0.176773563782530
2008-01-01	3.020282500614870
2009-01-01	2.897263582176940
2010-01-01	-0.898190133455009