2001 6.8

2002 6.8

1990 6.8

1997 6.8

1995 6.8

1977 6.8

2001 6.8

1999 6.8

1988 6.8

2003 6.8

1983 6.8

1967 6.8

1980 6.8

1993 6.8

2003 6.8

1999 6.8

1998 6.8

1989 6.9

1988 6.9

1994 6.9