| Chairman | 1912 – 1996 |
| Board of Directors | 1912 – 1993 |
| Board of Directors | 1912 – 1997 |
| Board of Directors | 1912 – 1998 |
| Chairman | 2007 – 2013 |
| Board of Directors | 1912 – 1999 |
| Board of Directors | 1912 – 1991 |
| Board of Directors | 1912 – 1991 |
| Board of Directors | 2010 – 2013 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 1912 – 1996 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1912 – 1991 |
| Deputy Chairman | 2007 – 2013 |
| Board of Directors | 1997 – 1999 |
| Chairman | 1999 – 2007 |
| Deputy Chairman | 1912 – 1997 |