| Former (31) |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1998 – 2000 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 1997 – 1998 |
| Chairman | 2001 – 2005 |
| Chairman | 1987 – 1997 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1987 – 1996 |
| Board of Directors | 2004 – 2007 |
| Deputy Chairman | 2004 – 2006 |
| Board of Directors | 2000 – 2007 |
| Board of Directors | 1987 – 1995 |
| Chairman | 2005 – 2008 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 1987 – 2000 |
| Board of Directors | 1996 – 2004 |
| Board of Directors | 1987 – 1992 |
| Board of Directors | 2004 – 2005 |
| Deputy Chairman | 2001 – 2003 |
| Deputy Chairman | 2003 – 2004 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 2001 – 2001 |
| Board of Directors | 2001 – 2001 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1987 – 2001 |
| Board of Directors | 1996 – 1998 |
| Deputy Chairman | 1987 – 1995 |
| Board of Directors | 1987 – 1997 |
| Deputy Chairman | 2006 – 2008 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 1987 – 1996 |