| Current (3) |
| Chairman | 2026 |
| Board of Directors | 2024 |
| Deputy Chairman | 2018 |
| Former (17) |
| Board of Directors | 1989 – 1991 |
| Board of Directors | 1998 – 2000 |
| Board of Directors | 1989 – 1989 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 2001 – 2007 |
| Board of Directors | 1999 – 2007 |
| Deputy Chairman | 2013 – 2018 |
| Chairman | 2007 – 2021 |
| Board of Directors | 1989 – 1991 |
| Board of Directors | 1989 – 1997 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 1989 – 1991 |
| Chairman | 1989 – 1989 |
| Chairman | 2021 – 2026 |
| Board of Directors | 1989 – 1998 |
| Deputy Chairman | 2007 – 2013 |
| Board of Directors | 1989 – 1998 |