| Current (2) |
| Chairman | 2025 |
| Board of Directors | 2024 |
| Former (24) |
| Board of Directors | 1972 – 1994 |
| Board of Directors | 2000 – 2021 |
| Board of Directors | 1972 – 1992 |
| Board of Directors | 1998 – 2006 |
| Board of Directors | 1972 – 1990 |
| Board of Directors | 2023 – 2024 |
| Board of Directors | 1998 – 2000 |
| Board of Directors | 2019 – 2023 |
| Chairman | 2024 – 2025 |
| Board of Directors | 1972 – 1994 |
| Board of Directors | 1972 – 1998 |
| Board of Directors | 1972 – 1992 |
| Board of Directors | 1972 – 1998 |
| Board of Directors | 1972 – 1998 |
| Board of Directors | 1972 – 1998 |
| Board of Directors | 1999 – 2000 |
| Chairman | 1998 – 1999 |
| Board of Directors | 2006 – 2019 |
| Board of Directors | 2023 – 2024 |
| Board of Directors | 2019 – 2024 |
| Board of Directors | 1972 – 1989 |
| Chairman | 1999 – 2000 |
| Board of Directors | 1972 – 1998 |
| Chairman | 2024 – 2024 |