Year	Percent Change
1971-01-01	8.7566227215911400
1972-01-01	6.0433300613485000
1973-01-01	11.7831601967688000
1974-01-01	19.8483084566056000
1975-01-01	24.8255830243589000
1976-01-01	17.0789865399317000
1977-01-01	10.1113182096495000
1978-01-01	4.1626736916623600
1979-01-01	6.2421908319536300
1980-01-01	13.0809014934051000
1981-01-01	11.9003498600063000
1982-01-01	7.5469497665346200
1983-01-01	6.2639966434456800
1984-01-01	6.4333934472274100
1985-01-01	5.0664100657983400
1986-01-01	2.5056019299458000
1987-01-01	3.7525830546717400
1988-01-01	6.5474090570742600
1989-01-01	8.0906218223163600
1990-01-01	5.9247431438892100
1991-01-01	3.9897595619608600
1992-01-01	2.0026749123637700
1993-01-01	-2.8339160964077300
1994-01-01	-3.9599429641159700
1995-01-01	-0.1200647758235430
1996-01-01	0.7630688728352120
1997-01-01	0.1868243192981720
1998-01-01	0.0451660696988567
1999-01-01	0.3594368632652120
2000-01-01	0.0703225136212575
2001-01-01	-0.7397466716419120
2002-01-01	1.5606553899310500
2003-01-01	0.9550280384424270
2004-01-01	-1.9757507380585900
2005-01-01	1.3498743797877600
2006-01-01	1.6820765153338300
2007-01-01	-0.4559988363033200
2008-01-01	4.6287939691815800
2009-01-01	14.7484429794050000
2010-01-01	-1.7639982737207900