| Current (3) |
| Board of Directors | 2025 |
| Chairman | 2024 |
| Board of Directors | 2022 |
| Former (21) |
| Board of Directors | 2021 – 2025 |
| Board of Directors | 1995 – 2009 |
| Board of Directors | 2015 – 2018 |
| Board of Directors | 2018 – 2020 |
| Board of Directors | 1973 – 1995 |
| Chairman | 2013 – 2015 |
| Board of Directors | 2009 – 2017 |
| Chairman | 2009 – 2009 |
| Board of Directors | 1996 – 1999 |
| Board of Directors | 2018 – 2020 |
| Board of Directors | 1973 – 1999 |
| Chairman | 2017 – 2018 |
| Board of Directors | 2013 – 2015 |
| Chairman | 1999 – 2009 |
| Chairman | 2009 – 2013 |
| Board of Directors | 2021 – 2022 |
| Chairman | 2015 – 2017 |
| Board of Directors | 2018 – 2020 |
| Chairman | 2021 – 2022 |
| Board of Directors | 1973 – 1989 |
| Chairman | 2021 – 2024 |