1988 6.1

1987 6.1

1981 6.1

1993 6.1

1984 6.1

2000 6.1

1998 6.1

1985 6.1

1998 6.1

1989 6.1

1991 6.1

1998 6.1

1994 6.1

1991 6.1

1994 6.1

1998 6.1

2002 6.1

1989 6.1

1991 6.1

1994 6.1