| Current (2) |
| Board of Directors | 2023 |
| Chairman | 2024 |
| Former (16) |
| Chairman | 1997 – 2017 |
| Board of Directors | 1997 – 2010 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 1997 – 2010 |
| Chairman | 1954 – 1990 |
| Deputy Chairman | 1954 – 1990 |
| Board of Directors | 2016 – 2018 |
| Chairman | 2017 – 2019 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2010 – 2015 |
| Board of Directors | 1954 – 1997 |
| Board of Directors | 1954 – 1990 |
| Board of Directors | 1954 – 1990 |
| Board of Directors | 1954 – 1988 |
| Chairman | 2019 – 2021 |
| Chairman | 2023 – 2024 |