Year	Percent Change
1971-01-01	0.682503666643697
1972-01-01	2.464619126040760
1973-01-01	3.728293929206250
1974-01-01	12.662258920226200
1975-01-01	7.409946450211350
1976-01-01	6.217544706168980
1977-01-01	6.945344761240720
1978-01-01	6.877136220177940
1979-01-01	7.840957986027290
1980-01-01	11.677351356079500
1981-01-01	4.847192900415850
1982-01-01	7.512830797681210
1983-01-01	-2.962104626148520
1984-01-01	0.302802848298836
1985-01-01	2.336259496139890
1986-01-01	4.257057909931450
1987-01-01	-3.769067181493280
1988-01-01	-0.399875246525472
1989-01-01	4.522165373870670
1990-01-01	3.288148936026820
1991-01-01	4.868662904222560
1992-01-01	2.421942364344790
1993-01-01	0.276841168621483
1994-01-01	-2.447749176524860
1995-01-01	-3.966880893235660
1996-01-01	-1.136679579063840
1997-01-01	-1.087822648751670
1998-01-01	-1.116524806996830
1999-01-01	-2.025726626903980
2000-01-01	2.083531490030390
2001-01-01	2.025231305135920
2002-01-01	-5.710497868781590
2003-01-01	-0.680773189792343
2004-01-01	-7.519673908229510
2005-01-01	-1.526434929637190
2006-01-01	0.146497149484681
2007-01-01	-1.647167691685730
2008-01-01	4.706362215860330
2009-01-01	0.340149468853816
2010-01-01	-3.156254761681760