Year % change from 1990 1991 -0.4728065075007 1992 -0.941211412962273 1993 -1.36607376412371 1994 -1.72721410949862 1995 -1.94598809810727 1996 -2.06598726350083 1997 -2.55986137957637 1998 -82.7747157219772 1999 -91.4573165580922 2000 102.844303482885 2001 -93.6491870276951 2002 -94.9247765231869 2003 -83.1456355911712 2004 -90.6822117449435 2005 -87.7904522655893 2006 -87.3437696580266 2007 205.735016438906 2008 -76.9295155596144 2009 -79.3319968092957 2010 -75.0142799006817 2011 -75.014279900682 2012 -75.0142799006836