1996 6.1

1991 6.1

1981 6.1

1988 6.1

1986 6.1

1986 6.1

1988 6.1

1996 6.1

1992 6.1

1988 6.1

2000 6.1

2000 6.1

1991 6.1

1983 6.1

1990 6.1

1999 6.1

1989 6.1

1997 6.1

1988 6.1

1999 6.1