| Current (3) |
| Board of Directors | 2023 |
| Board of Directors | 2021 |
| Chairman | 2025 |
| Former (21) |
| Board of Directors | 1983 – 1992 |
| Board of Directors | 2000 – 2008 |
| Chairman | 2017 – 2019 |
| Chairman | 2000 – 2005 |
| Board of Directors | 1983 – 1997 |
| Board of Directors | 2005 – 2011 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 2011 – 2021 |
| Chairman | 2005 – 2017 |
| Board of Directors | 1983 – 2000 |
| Chairman | 2019 – 2022 |
| Board of Directors | 1983 – 2007 |
| Board of Directors | 1983 – 1995 |
| Chairman | 1983 – 1990 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 2008 – 2011 |
| Board of Directors | 2017 – 2021 |
| Board of Directors | 2017 – 2021 |
| Chairman | 2022 – 2025 |
| Board of Directors | 1995 – 2008 |
| Board of Directors | 1983 – 1999 |