| Board of Directors | 1985 – 1989 |
| Board of Directors | 1993 – 2002 |
| Board of Directors | 1985 – 2002 |
| Board of Directors | 1985 – 1994 |
| Board of Directors | 1985 – 2002 |
| Board of Directors | 1985 – 1989 |
| Deputy Chairman | 1985 – 1987 |
| Board of Directors | 1985 – 2002 |
| Board of Directors | 1985 – 1994 |
| Board of Directors | 1985 – 2002 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 1985 – 1989 |
| Deputy Chairman | 1985 – 1987 |
| Board of Directors | 1985 – 1994 |
| Chairman | 1985 – 1987 |
| Board of Directors | 1985 – 1993 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 2000 – 2000 |
| Deputy Chairman | 1985 – 2002 |
| Chairman | 1985 – 2002 |
| Board of Directors | 1985 – 1994 |
| Board of Directors | 2000 – 2002 |