| Board of Directors | 1977 – 1992 |
| Chairman | 1977 – 1991 |
| Board of Directors | 1994 – 1998 |
| Board of Directors | 1977 – 1998 |
| Board of Directors | 1977 – 1991 |
| Board of Directors | 1977 – 1989 |
| Board of Directors | 1977 – 1998 |
| Board of Directors | 1977 – 1989 |
| Deputy Chairman | 1977 – 1998 |
| Board of Directors | 1992 – 1992 |
| Board of Directors | 1977 – 1988 |
| Board of Directors | 1998 – 1998 |
| Board of Directors | 1977 – 1994 |
| Chairman | 1993 – 1998 |
| Chairman | 1977 – 1990 |
| Board of Directors | 1977 – 1989 |
| Board of Directors | 1977 – 1998 |