| Chairman | 1987 – 1997 |
| Board of Directors | 1987 – 1987 |
| Board of Directors | 1997 – 1998 |
| Chairman | 1998 – 2005 |
| Board of Directors | 1987 – 1990 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1987 – 1993 |
| Board of Directors | 1987 – 1998 |
| Board of Directors | 1987 – 1987 |
| Board of Directors | 1998 – 2005 |
| Board of Directors | 2002 – 2005 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1987 – 1993 |
| Board of Directors | 1987 – 1997 |
| Chairman | 1987 – 1987 |