| Former (20) |
| Chairman | 2008 – 2012 |
| Board of Directors | 1910 – 1999 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 1999 – 2010 |
| Board of Directors | 1910 – 1988 |
| Chairman | 2007 – 2008 |
| Board of Directors | 1910 – 2006 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 2006 – 2007 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 2010 – 2012 |
| Chairman | 1910 – 1988 |
| Board of Directors | 1910 – 1996 |
| Board of Directors | 2006 – 2012 |
| Board of Directors | 1910 – 2002 |
| Board of Directors | 2002 – 2006 |
| Board of Directors | 1910 – 2006 |
| Board of Directors | 2010 – 2012 |
| Board of Directors | 1910 – 1991 |
| Board of Directors | 1910 – 2007 |