Year	Percent Change
1981-01-01	13.58607934283000000
1982-01-01	11.71579212704990000
1983-01-01	12.01174945167150000
1984-01-01	8.75859126108889000
1985-01-01	7.00763085873036000
1986-01-01	9.50384256972556000
1987-01-01	8.10910613818711000
1988-01-01	5.95490664112281000
1989-01-01	4.77653208874504000
1990-01-01	9.22271580807545000
1991-01-01	11.15946022803460000
1992-01-01	9.60522010441116000
1993-01-01	7.35970130387884000
1994-01-01	2.19373607908787000
1995-01-01	1.83703155326582000
1996-01-01	4.78941054877712000
1997-01-01	4.83425101002550000
1998-01-01	4.28071139939271000
1999-01-01	3.93887368426368000
2000-01-01	4.82229386888571000
2001-01-01	3.74294092472525000
2002-01-01	3.12137416879697000
2003-01-01	2.62244765965710000
2004-01-01	2.12575707121091000
2005-01-01	2.20822222767697000
2006-01-01	3.24383027480089000
2007-01-01	3.44777458136571000
2008-01-01	4.59939395669368000
2009-01-01	1.16818344636372000
2010-01-01	-0.00795632118743718