| Former (21) |
| Board of Directors | 1979 – 1995 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 2005 – 2007 |
| Deputy Chairman | 1979 – 1997 |
| Deputy Chairman | 1997 – 2001 |
| Board of Directors | 1999 – 2005 |
| Chairman | 1979 – 2003 |
| Board of Directors | 2005 – 2007 |
| Board of Directors | 1979 – 1997 |
| Board of Directors | 1979 – 2006 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1979 – 1991 |
| Board of Directors | 2004 – 2005 |
| Chairman | 2005 – 2007 |
| Deputy Chairman | 2004 – 2005 |
| Chairman | 2004 – 2005 |
| Board of Directors | 1979 – 1997 |
| Board of Directors | 1979 – 1989 |
| Board of Directors | 1979 – 1999 |
| Deputy Chairman | 2005 – 2007 |