| Current (5) |
| Board of Directors | 2023 |
| Chairman | 2021 |
| Board of Directors | 2024 |
| Board of Directors | 2014 |
| Deputy Chairman | 2021 |
| Former (12) |
| Chairman | 1997 – 2007 |
| Board of Directors | 2002 – 2024 |
| Board of Directors | 1986 – 1994 |
| Board of Directors | 1986 – 1989 |
| Chairman | 1986 – 1997 |
| Chairman | 1986 – 1994 |
| Board of Directors | 1986 – 2000 |
| Board of Directors | 1986 – 2002 |
| Board of Directors | 1986 – 1991 |
| Board of Directors | 1986 – 1992 |
| Chairman | 2007 – 2021 |
| Board of Directors | 1997 – 2014 |
