| Current (5) |
| Chairman | 2026 |
| Board of Directors | 2026 |
| Board of Directors | 2026 |
| Board of Directors | 2024 |
| Board of Directors | 2017 |
| Former (27) |
| Board of Directors | 1939 – 1996 |
| Board of Directors | 2015 – 2018 |
| Board of Directors | 2006 – 2007 |
| Board of Directors | 2025 – 2026 |
| Deputy Chairman | 2004 – 2006 |
| Board of Directors | 1939 – 1987 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1939 – 1992 |
| Board of Directors | 2010 – 2018 |
| Chairman | 2021 – 2026 |
| Board of Directors | 1939 – 1989 |
| Chairman | 1996 – 2006 |
| Chairman | 2006 – 2007 |
| Chairman | 2007 – 2013 |
| Board of Directors | 1939 – 2006 |
| Board of Directors | 2016 – 2021 |
| Board of Directors | 2004 – 2006 |
| Deputy Chairman | 2006 – 2009 |
| Chairman | 2015 – 2018 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1939 – 2001 |
| Board of Directors | 2013 – 2017 |
| Board of Directors | 2010 – 2017 |
| Board of Directors | 2009 – 2015 |
| Board of Directors | 2018 – 2026 |
| Board of Directors | 2022 – 2024 |
| Chairman | 2019 – 2021 |