2001 6.8

1997 6.8

2002 6.8

1969 6.8

1988 6.8

1990 6.8

1997 6.8

1984 6.8

1989 6.8

1999 6.8

2003 6.8

1991 6.8

1992 6.8

1977 6.8

1983 6.8

2003 6.8

1999 6.8

2002 6.8

1999 6.8

1989 6.8