| Current (3) |
| Board of Directors | 2025 |
| Chairman | 2021 |
| Board of Directors | 2022 |
| Former (15) |
| Chairman | 2008 – 2009 |
| Board of Directors | 2006 – 2009 |
| Board of Directors | 2002 – 2002 |
| Board of Directors | 1948 – 1989 |
| Board of Directors | 2008 – 2009 |
| Board of Directors | 2018 – 2022 |
| Chairman | 2016 – 2021 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 2002 – 2006 |
| Chairman | 2002 – 2008 |
| Board of Directors | 1948 – 2002 |
| Board of Directors | 2016 – 2018 |
| Board of Directors | 1948 – 2002 |
| Board of Directors | 1948 – 1989 |
| Chairman | 2009 – 2016 |