| Current (2) |
| Chairman | 2022 |
| Board of Directors | 2025 |
| Former (14) |
| Board of Directors | 1996 – 2003 |
| Chairman | 2006 – 2022 |
| Board of Directors | 1997 – 2001 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 2017 – 2023 |
| Board of Directors | 1982 – 1991 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 2007 – 2017 |
| Chairman | 2001 – 2004 |
| Board of Directors | 1998 – 1998 |
| Board of Directors | 1982 – 1990 |
| Chairman | 2004 – 2006 |
| Board of Directors | 2023 – 2025 |