year    r     Error
1993  0.0210 0.0048
1994  0.0211 0.0030
1995  0.0193 0.0027
1996  0.0187 0.0033
1997  0.0193 0.0027
1998  0.0279 0.0030
1999  0.0351 0.0033
2000  0.0315 0.0045
2001  0.0292 0.0039
2002  0.0302 0.0042
2003  0.0335 0.0051
2004  0.0353 0.0054
2005  0.0314 0.0063
2006    -      -