| Chairman | 1991 – 2004 |
| Board of Directors | 1991 – 2000 |
| Board of Directors | 1991 – 1997 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 2001 – 2004 |
| Deputy Chairman | 1991 – 2004 |
| Board of Directors | 1991 – 1998 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1991 – 1998 |