| Former (19) |
| Chairman | 2016 – 2017 |
| Board of Directors | 2000 – 2019 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 2023 – 2026 |
| Chairman | 2006 – 2015 |
| Board of Directors | 2022 – 2023 |
| Board of Directors | 2000 – 2019 |
| Chairman | 1989 – 2004 |
| Chairman | 2020 – 2021 |
| Chairman | 2021 – 2023 |
| Chairman | 2015 – 2016 |
| Board of Directors | 2017 – 2019 |
| Board of Directors | 2023 – 2026 |
| Chairman | 2017 – 2019 |
| Board of Directors | 2015 – 2019 |
| Chairman | 2023 – 2026 |
| Chairman | 2004 – 2006 |
| Board of Directors | 1989 – 1996 |
| Board of Directors | 2021 – 2024 |