| Current (4) |
| Chairman | 2023 |
| Board of Directors | 2026 |
| Board of Directors | 2024 |
| Board of Directors | 2026 |
| Former (13) |
| Board of Directors | 1986 – 1999 |
| Board of Directors | 1986 – 1999 |
| Chairman | 1986 – 1988 |
| Board of Directors | 1986 – 1999 |
| Board of Directors | 1986 – 1991 |
| Board of Directors | 1986 – 1991 |
| Chairman | 2018 – 2023 |
| Chairman | 2010 – 2017 |
| Board of Directors | 1998 – 2009 |
| Board of Directors | 1986 – 1998 |
| Chairman | 2017 – 2018 |
| Board of Directors | 1986 – 1988 |
| Board of Directors | 1999 – 2004 |