Year	Percent Change
1971-01-01	0.301221397825208
1972-01-01	2.062231034277860
1973-01-01	2.412688982748180
1974-01-01	14.438834296213700
1975-01-01	18.855371844532100
1976-01-01	5.750250162561080
1977-01-01	5.305326743901640
1978-01-01	5.734464207981220
1979-01-01	8.799033464036560
1980-01-01	14.917782225951400
1981-01-01	9.201027623603780
1982-01-01	14.742647927390800
1983-01-01	0.151348665197611
1984-01-01	-4.100302309181140
1985-01-01	2.312789579005740
1986-01-01	3.910296071517120
1987-01-01	1.753897501740600
1988-01-01	3.149887898937840
1989-01-01	4.461575640844180
1990-01-01	4.354314256115850
1991-01-01	6.185149963377800
1992-01-01	0.543716267414484
1993-01-01	-2.876306398359030
1994-01-01	-2.752805835984160
1995-01-01	0.617153032217239
1996-01-01	1.583466885727900
1997-01-01	-1.918503337791850
1998-01-01	0.108056141730167
1999-01-01	-0.982209622974083
2000-01-01	-3.609759609504230
2001-01-01	5.958576654174020
2002-01-01	1.933085946300690
2003-01-01	3.952439363402210
2004-01-01	2.615616856204930
2005-01-01	0.785644475817814
2006-01-01	2.610945795672900
2007-01-01	2.340702767093790
2008-01-01	3.010071723723520
2009-01-01	1.293736488193020
2010-01-01	-2.867710791920890