Year % change from 1990 1991 -0.555500000001008 1992 -1.11099999999776 1993 -1.66675000000003 1994 -2.22224999999804 1995 -2.77774999999829 1996 -3.33324999999679 1997 -3.88899999999905 1998 -100.000000000001 1999 -100.000000000001 2000 -100.000000000001 2001 -100.000000000001 2002 -99.9999999999993 2003 -99.9999999999993 2004 -99.9999999999991 2005 -99.9999999999998 2006 -99.9999999999993 2007 -99.9999999999975 2008 -99.9999999999995 2009 -100.000000000001 2010 -100.000000000001 2011 -100.000000000001 2012 -100.000000000001