| Former (19) |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2014 – 2015 |
| Chairman | 2016 – 2024 |
| Board of Directors | 2015 – 2017 |
| Board of Directors | 2017 – 2022 |
| Chairman | 2003 – 2004 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 2008 – 2008 |
| Board of Directors | 1936 – 1998 |
| Chairman | 2004 – 2011 |
| Chairman | 1936 – 2001 |
| Board of Directors | 2008 – 2013 |
| Board of Directors | 2022 – 2024 |
| Board of Directors | 1936 – 1992 |
| Board of Directors | 1936 – 1991 |
| Chairman | 1936 – 1995 |
| Board of Directors | 1936 – 1988 |
| Chairman | 2011 – 2016 |