| Former (19) |
| Board of Directors | 1989 – 1989 |
| Board of Directors | 2001 – 2006 |
| Board of Directors | 2006 – 2007 |
| Chairman | 1997 – 2002 |
| Chairman | 1997 – 1997 |
| Board of Directors | 2001 – 2004 |
| Chairman | 2002 – 2004 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 1989 – 1998 |
| Deputy Chairman | 1997 – 1997 |
| Deputy Chairman | 1997 – 2007 |
| Board of Directors | 2006 – 2006 |
| Board of Directors | 1989 – 1989 |
| Board of Directors | 1989 – 1991 |
| Board of Directors | 2006 – 2007 |
| Board of Directors | 1989 – 2001 |
| Chairman | 2004 – 2007 |
| Deputy Chairman | 1989 – 1993 |