| Current (4) |
| Board of Directors | 2019 |
| Chairman | 2024 |
| Board of Directors | 2021 |
| Board of Directors | 2023 |
| Former (31) |
| Chairman | 1927 – 1992 |
| Board of Directors | 2008 – 2013 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1927 – 1991 |
| Board of Directors | 1927 – 1995 |
| Chairman | 2011 – 2017 |
| Board of Directors | 1927 – 2001 |
| Board of Directors | 2011 – 2016 |
| Board of Directors | 1927 – 1995 |
| Chairman | 2021 – 2024 |
| Board of Directors | 2011 – 2012 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 1927 – 1998 |
| Board of Directors | 2007 – 2011 |
| Board of Directors | 1927 – 1999 |
| Chairman | 2017 – 2021 |
| Board of Directors | 2001 – 2005 |
| Board of Directors | 1927 – 2007 |
| Board of Directors | 1927 – 1995 |
| Board of Directors | 1927 – 1993 |
| Board of Directors | 1927 – 1991 |
| Board of Directors | 1927 – 1990 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 1927 – 1987 |
| Board of Directors | 2005 – 2011 |
| Board of Directors | 2016 – 2019 |
| Board of Directors | 1927 – 1997 |
| Board of Directors | 1997 – 2003 |
| Board of Directors | 2013 – 2018 |
| Board of Directors | 2012 – 2019 |
| Board of Directors | 1927 – 1995 |