year    r     Error
1993    -      -
1994    -      -
1995  0.0098 0.0117
1996  0.0168 0.0033
1997  0.0164 0.0024
1998  0.0167 0.0021
1999  0.0218 0.0021
2000  0.0250 0.0021
2001  0.0218 0.0024
2002  0.0233 0.0021
2003  0.0245 0.0021
2004  0.0251 0.0024
2005  0.0282 0.0015
2006  0.0286 0.0024