Year	Percent Change
1970-01-01	12.512621490880100
1971-01-01	15.363742542242600
1972-01-01	10.708112779987200
1973-01-01	11.648124610882000
1974-01-01	16.407833723760400
1975-01-01	16.652521290841500
1976-01-01	6.644304473704800
1977-01-01	6.331548950903770
1978-01-01	5.632408458170810
1979-01-01	6.604323969065810
1980-01-01	-7.843460336857320
1981-01-01	2.578213112297040
1982-01-01	3.523943356196200
1983-01-01	1.571459106499310
1984-01-01	1.049736652621330
1985-01-01	3.395342700537150
1986-01-01	-0.498479754569735
1987-01-01	-0.368323474491282
1988-01-01	1.505800724730130
1989-01-01	0.041090471503171
1990-01-01	2.499478864160360
1991-01-01	4.156623191632050
1992-01-01	4.206039024702860
1993-01-01	2.654732220996190
1994-01-01	1.790235659444090
1995-01-01	2.340966757038210
1996-01-01	2.748551252675570
1997-01-01	3.815403127208620
1998-01-01	5.237955901331600
1999-01-01	4.880449910787670
2000-01-01	5.845108966162900
2001-01-01	5.296778657405970
2002-01-01	5.400526749796340
2003-01-01	2.479843940773730
2004-01-01	0.912801216250354
2005-01-01	1.181229071921470
2006-01-01	2.596604356202750
2007-01-01	4.200703039359340
2008-01-01	2.777295466375870
2009-01-01	1.372819390949690
2010-01-01	0.310310696806849