Year	Percent Change
1971-01-01	11.6025729944064000
1972-01-01	5.5165308695530500
1973-01-01	11.8100109682021000
1974-01-01	17.9702382890893000
1975-01-01	22.9268606026778000
1976-01-01	14.6384150909457000
1977-01-01	18.3984990920682000
1978-01-01	13.0001149107469000
1979-01-01	14.3144427030921000
1980-01-01	19.2777514201725000
1981-01-01	20.3059448276634000
1982-01-01	16.1007520444481000
1983-01-01	15.3315870805091000
1984-01-01	8.5101661397738700
1985-01-01	7.5802968117292100
1986-01-01	5.2459296383127900
1987-01-01	4.9863583583013200
1988-01-01	5.3011492818703500
1989-01-01	5.2543745109865800
1990-01-01	9.1556175418251400
1991-01-01	7.8258825381306900
1992-01-01	4.1984246582258300
1993-01-01	1.2880682109068300
1994-01-01	-0.3203636735516600
1995-01-01	1.3995650990716500
1996-01-01	5.0567115928541800
1997-01-01	2.5150597545088800
1998-01-01	-1.4660937305570200
1999-01-01	1.5475195139998600
2000-01-01	-0.0923764675471809
2001-01-01	3.0955414149267200
2002-01-01	3.3013839344325600
2003-01-01	3.5843920514217400
2004-01-01	2.4857996943618500
2005-01-01	1.9664514001860400
2006-01-01	2.4599940169586400
2007-01-01	3.5139766930347900
2008-01-01	3.4378178930757800
2009-01-01	3.5758806901184000
2010-01-01	-0.0395111509060472