Year	Percent Change
1971-01-01	12.919176273782900
1972-01-01	1.687909064563560
1973-01-01	7.297201859036860
1974-01-01	19.979988367647400
1975-01-01	28.473617597576000
1976-01-01	8.621635646785360
1977-01-01	14.978654198358000
1978-01-01	9.490086801253140
1979-01-01	11.110228851621700
1980-01-01	11.335512284742700
1981-01-01	19.741039851768000
1982-01-01	16.621384817842500
1983-01-01	12.552501884596900
1984-01-01	6.774001789771570
1985-01-01	6.469191673950610
1986-01-01	5.513923477333530
1987-01-01	2.879825441001960
1988-01-01	3.508889379837190
1989-01-01	6.376801012062840
1990-01-01	7.840819853357630
1991-01-01	8.178510216887280
1992-01-01	2.607192209397410
1993-01-01	2.554752145885170
1994-01-01	-2.756935662784360
1995-01-01	0.919757515494151
1996-01-01	5.110720088538590
1997-01-01	2.060074386494810
1998-01-01	-0.291912434735491
1999-01-01	1.635182524205560
2000-01-01	-1.959060430109940
2001-01-01	2.936104032439540
2002-01-01	4.068372168759100
2003-01-01	5.813053258528430
2004-01-01	1.977401792192140
2005-01-01	1.584232320025070
2006-01-01	0.618767005647725
2007-01-01	2.234085830145950
2008-01-01	7.684597791406240
2009-01-01	4.457353417779280
2010-01-01	-0.524847291426360