1972

1974a

1974b

1976a

1976b

1977

1986

1987

1988

1989

1991

1994a*

1994b

1995a*

1995b*

1995c

1996a*

1996b

1997**

1998*

2000*

2001a

2001b

2002a*

2002b

2002c

2003a

2003b*

2003c**

2004a