Year	Percent Change
1971-01-01	9.443703948476180
1972-01-01	5.154405209391830
1973-01-01	8.867035137757090
1974-01-01	11.468492611038700
1975-01-01	6.737880313878430
1976-01-01	5.418840952122390
1977-01-01	2.647403300770150
1978-01-01	2.589702459915770
1979-01-01	3.452999008965070
1980-01-01	5.281325358623960
1981-01-01	4.483223263302420
1982-01-01	3.114388271277930
1983-01-01	1.288095695123870
1984-01-01	1.190710026574720
1985-01-01	1.929027939440380
1986-01-01	1.350716725335950
1987-01-01	1.813975515599080
1988-01-01	1.392435537936480
1989-01-01	1.508803119354890
1990-01-01	2.076419010737900
1991-01-01	5.382655330028870
1992-01-01	7.959664987565690
1993-01-01	3.929576949480180
1994-01-01	2.578742657751420
1995-01-01	0.551763000480118
1996-01-01	-0.133896144872197
1997-01-01	1.638297465792950
1998-01-01	3.625472707807120
1999-01-01	4.536442199195950
2000-01-01	4.736258592404330
2001-01-01	1.927568718873100
2002-01-01	1.056415966841660
2003-01-01	2.524891665293450
2004-01-01	3.438701512930130
2005-01-01	0.569708244681521
2006-01-01	-1.089879971024820
2007-01-01	0.932017319111539
2008-01-01	2.406182733949030
2009-01-01	2.411481146194080
2010-01-01	1.305703648485250