| Former (19) |
| Chairman | 1969 – 1997 |
| Board of Directors | 1969 – 1999 |
| Board of Directors | 1969 – 1987 |
| Board of Directors | 1969 – 1993 |
| Board of Directors | 1969 – 1994 |
| Board of Directors | 1969 – 1992 |
| Board of Directors | 1969 – 1999 |
| Chairman | 1969 – 1987 |
| Board of Directors | 1969 – 1995 |
| Board of Directors | 1969 – 1993 |
| Board of Directors | 1969 – 1996 |
| Chairman | 1998 – 1999 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1969 – 1993 |
| Board of Directors | 1969 – 1997 |
| Chairman | 1997 – 1998 |
| Board of Directors | 1969 – 1990 |
| Deputy Chairman | 1998 – 1999 |
| Board of Directors | 1969 – 1997 |