| Former (20) |
| Chairman | 2003 – 2003 |
| Board of Directors | 1961 – 1987 |
| Board of Directors | 1961 – 1989 |
| Board of Directors | 1961 – 2003 |
| Deputy Chairman | 1961 – 1999 |
| Board of Directors | 1961 – 1989 |
| Board of Directors | 2003 – 2003 |
| Chairman | 2000 – 2003 |
| Deputy Chairman | 1961 – 1992 |
| Board of Directors | 1961 – 1998 |
| Board of Directors | 1961 – 1988 |
| Board of Directors | 1961 – 1987 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 1961 – 1993 |
| Board of Directors | 1961 – 1989 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1961 – 1987 |
| Board of Directors | 1961 – 1987 |
| Board of Directors | 1961 – 1999 |
| Board of Directors | 1999 – 2000 |