Year Percent Change 1996-01-01 9.958376328601540 1997-01-01 11.704145547394800 1998-01-01 2.642981182437120 1999-01-01 7.373162891576320 2000-01-01 14.381471440905900 2001-01-01 2.297443357498130 2002-01-01 3.383529557007530 2003-01-01 3.551447159863670 2004-01-01 2.229752558099590 2005-01-01 3.040414357129860 2006-01-01 0.253542692338866 2007-01-01 1.890854090930720 2008-01-01 1.057994858770850 2009-01-01 5.031000829288030 2010-01-01 0.992912251805598