| Board of Directors | 1998 – 2000 |
| Board of Directors | 1990 – 1991 |
| Deputy Chairman | 1990 – 1992 |
| Chairman | 2004 – 2007 |
| Board of Directors | 1996 – 2000 |
| Board of Directors | 1990 – 1998 |
| Chairman | 1990 – 1994 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1990 – 1994 |
| Board of Directors | 1990 – 1994 |
| Chairman | 1990 – 1996 |
| Chairman | 2000 – 2002 |
| Deputy Chairman | 2006 – 2007 |
| Board of Directors | 1990 – 2007 |
| Chairman | 1990 – 1991 |
| Deputy Chairman | 1990 – 1996 |
| Deputy Chairman | 2004 – 2006 |
| Board of Directors | 1990 – 1991 |