| Current (3) |
| Chairman | 2023 |
| Board of Directors | 2026 |
| Deputy Chairman | 2022 |
| Former (14) |
| Deputy Chairman | 2001 – 2015 |
| Deputy Chairman | 2001 – 2001 |
| Chairman | 1985 – 2000 |
| Board of Directors | 1985 – 1990 |
| Board of Directors | 1985 – 1993 |
| Deputy Chairman | 2015 – 2020 |
| Board of Directors | 1985 – 2000 |
| Board of Directors | 1985 – 1988 |
| Deputy Chairman | 2020 – 2022 |
| Board of Directors | 2000 – 2001 |
| Deputy Chairman | 1985 – 1989 |
| Chairman | 2000 – 2023 |
| Deputy Chairman | 1985 – 1991 |
| Deputy Chairman | 1985 – 2000 |