| Current (3) |
| Board of Directors | 2023 |
| Chairman | 2023 |
| Board of Directors | 2017 |
| Former (13) |
| Board of Directors | 1990 – 1996 |
| Chairman | 2009 – 2023 |
| Board of Directors | 1990 – 1996 |
| Board of Directors | 1996 – 2004 |
| Board of Directors | 1990 – 1993 |
| Board of Directors | 1990 – 1996 |
| Board of Directors | 2004 – 2009 |
| Board of Directors | 2004 – 2009 |
| Chairman | 2001 – 2004 |
| Chairman | 2004 – 2009 |
| Chairman | 1990 – 2001 |
| Board of Directors | 1996 – 2000 |
| Board of Directors | 1996 – 2026 |