| Current (3) |
| Board of Directors | 2024 |
| Deputy Chairman | 2016 |
| Chairman | 2023 |
| Former (13) |
| Chairman | 2019 – 2023 |
| Chairman | 2000 – 2016 |
| Board of Directors | 1972 – 2005 |
| Board of Directors | 2021 – 2022 |
| Board of Directors | 1972 – 1989 |
| Board of Directors | 1972 – 2005 |
| Board of Directors | 1972 – 1992 |
| Chairman | 2016 – 2016 |
| Board of Directors | 2016 – 2024 |
| Chairman | 2016 – 2019 |
| Board of Directors | 2022 – 2023 |
| Board of Directors | 1972 – 2000 |
| Chairman | 1972 – 2000 |