| Chairman | 1996 – 1999 |
| Chairman | 1994 – 1994 |
| Board of Directors | 1980 – 1999 |
| Chairman | 1999 – 2009 |
| Board of Directors | 1999 – 2009 |
| Board of Directors | 1999 – 2009 |
| Board of Directors | 1980 – 1993 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 1980 – 1996 |
| Chairman | 1980 – 1994 |
| Board of Directors | 1980 – 1990 |
| Board of Directors | 1980 – 1992 |
| Chairman | 1980 – 1992 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 1980 – 1994 |
| Chairman | 1994 – 1996 |
| Board of Directors | 1996 – 1999 |
| Board of Directors | 1980 – 1994 |