| Chairman | 1912 – 1993 |
| Board of Directors | 1998 – 2006 |
| Board of Directors | 2007 – 2010 |
| Deputy Chairman | 1912 – 1993 |
| Board of Directors | 2010 – 2017 |
| Board of Directors | 1912 – 1991 |
| Deputy Chairman | 1999 – 2002 |
| Board of Directors | 2009 – 2011 |
| Deputy Chairman | 1912 – 1989 |
| Board of Directors | 2015 – 2017 |
| Board of Directors | 2007 – 2007 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 2013 – 2016 |
| Board of Directors | 2007 – 2009 |
| Chairman | 1998 – 2002 |
| Deputy Chairman | 2010 – 2013 |
| Board of Directors | 1912 – 1990 |
| Chairman | 2007 – 2010 |
| Board of Directors | 2009 – 2011 |
| Board of Directors | 1993 – 1998 |
| Deputy Chairman | 2006 – 2007 |
| Board of Directors | 1912 – 1989 |
| Deputy Chairman | 2013 – 2017 |
| Chairman | 2010 – 2017 |
| Chairman | 2006 – 2007 |
| Board of Directors | 1912 – 1993 |
| Board of Directors | 1993 – 1998 |
| Board of Directors | 2009 – 2009 |
| Board of Directors | 1993 – 1998 |
| Board of Directors | 2011 – 2017 |