Year Percent Change 1996-01-01 37.278172239277600 1997-01-01 18.478961250263400 1998-01-01 14.110909356280500 1999-01-01 12.154358474157100 2000-01-01 9.676568381200400 2001-01-01 8.906450477603140 2002-01-01 -0.321348889958392 2003-01-01 -5.837124157915000 2004-01-01 -1.467013662380390 2005-01-01 -0.576236983141627 2006-01-01 -1.057420318064260 2007-01-01 3.790910563373650 2008-01-01 5.838303086370580 2009-01-01 2.286519373241850 2010-01-01 1.891427592388000