| Current (4) |
| Board of Directors | 2023 |
| Board of Directors | 2024 |
| Board of Directors | 2019 |
| Chairman | 2017 |
| Former (15) |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 2022 – 2023 |
| Board of Directors | 2005 – 2012 |
| Chairman | 2005 – 2017 |
| Board of Directors | 1969 – 1990 |
| Board of Directors | 1969 – 2026 |
| Board of Directors | 1969 – 1990 |
| Board of Directors | 1969 – 1999 |
| Board of Directors | 2010 – 2012 |
| Board of Directors | 1969 – 1992 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 2017 – 2019 |
| Chairman | 1969 – 1992 |
| Board of Directors | 1969 – 2003 |
| Board of Directors | 1969 – 1993 |