| Former (16) |
| Chairman | 2006 – 2008 |
| Board of Directors | 1983 – 1996 |
| Board of Directors | 1983 – 1998 |
| Board of Directors | 1983 – 1991 |
| Chairman | 1983 – 1998 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1983 – 1988 |
| Deputy Chairman | 1996 – 1997 |
| Chairman | 1998 – 2006 |
| Board of Directors | 1996 – 1998 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 1996 – 1996 |
| Board of Directors | 1983 – 1995 |
| Board of Directors | 1998 – 1998 |
| Board of Directors | 1983 – 1998 |
| Board of Directors | 1983 – 1995 |