year r Error 1993 - - 1994 - - 1995 0.0189 0.0048 1996 0.0187 0.0033 1997 0.0180 0.0030 1998 0.0208 0.0039 1999 0.0181 0.0051 2000 0.0052 0.0039 2001 -0.0062 0.0063 2002 -0.0039 0.0096 2003 0.0150 0.0111 2004 0.0180 0.0108 2005 0.0208 0.0141 2006 0.0284 0.0279