| Current (3) |
| Chairman | 2022 |
| Board of Directors | 2023 |
| Board of Directors | 2026 |
| Former (12) |
| Board of Directors | 1991 – 1992 |
| Board of Directors | 1991 – 2014 |
| Chairman | 2020 – 2022 |
| Board of Directors | 2014 – 2020 |
| Board of Directors | 1991 – 1998 |
| Board of Directors | 2023 – 2026 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 1991 – 1995 |
| Board of Directors | 1991 – 1993 |
| Chairman | 1991 – 1992 |
| Board of Directors | 1991 – 1993 |
| Board of Directors | 2020 – 2023 |