| Current (5) |
| Board of Directors | 2023 |
| Board of Directors | 2019 |
| Chairman | 2020 |
| Board of Directors | 2021 |
| Board of Directors | 2018 |
| Former (16) |
| Chairman | 1901 – 1997 |
| Board of Directors | 1901 – 2013 |
| Board of Directors | 1998 – 2012 |
| Board of Directors | 1901 – 1996 |
| Board of Directors | 2010 – 2014 |
| Board of Directors | 2013 – 2016 |
| Chairman | 1901 – 2014 |
| Board of Directors | 2016 – 2019 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 2014 – 2018 |
| Board of Directors | 2000 – 2010 |
| Board of Directors | 2007 – 2013 |
| Board of Directors | 2019 – 2023 |
| Board of Directors | 1901 – 2000 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 1901 – 2002 |