| Current (2) |
| Chairman | 2026 |
| Board of Directors | 2026 |
| Former (13) |
| Chairman | 2008 – 2026 |
| Board of Directors | 1998 – 2004 |
| Deputy Chairman | 1990 – 1996 |
| Board of Directors | 1990 – 1990 |
| Board of Directors | 1990 – 1996 |
| Board of Directors | 2012 – 2026 |
| Chairman | 2006 – 2008 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 2008 – 2012 |
| Board of Directors | 1990 – 1993 |
| Chairman | 1990 – 1990 |
| Board of Directors | 1990 – 1993 |
| Chairman | 1990 – 1998 |