1981 7.1

1983 7.1

1990 7.1

1970 7.1

1981 7.1

1982 7.1

1998 7.1

1973 7.1

1987 7.1

1982 7.1

1992 7.1

1999 7.1

1989 7.1

2004 7.1

2000 7.1

1990 7.1

1983 7.1

2004 7.1

1978 7.1

2003 7.1