| Former (17) |
| Board of Directors | 1961 – 1999 |
| Board of Directors | 1961 – 1990 |
| Board of Directors | 1961 – 1999 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 1961 – 1999 |
| Board of Directors | 1961 – 1997 |
| Board of Directors | 1961 – 1994 |
| Board of Directors | 1961 – 1990 |
| Deputy Chairman | 1961 – 1989 |
| Board of Directors | 1961 – 1998 |
| Chairman | 1961 – 1994 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 1961 – 1991 |
| Chairman | 1961 – 1999 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1961 – 1999 |
| Board of Directors | 1961 – 1994 |