| Board of Directors | 1926 – 1997 |
| Board of Directors | 2004 – 2008 |
| Board of Directors | 1926 – 1992 |
| Chairman | 2002 – 2008 |
| Board of Directors | 1926 – 1988 |
| Chairman | 1926 – 2002 |
| Chairman | 1926 – 1988 |
| Board of Directors | 1926 – 1996 |
| Board of Directors | 2002 – 2002 |
| Deputy Chairman | 1926 – 2008 |
| Chairman | 1926 – 1995 |
| Board of Directors | 2001 – 2008 |
| Board of Directors | 1926 – 1994 |
| Board of Directors | 2004 – 2008 |
| Board of Directors | 1926 – 1989 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 1926 – 1990 |
| Deputy Chairman | 2001 – 2002 |