| Current (3) |
| Board of Directors | 2026 |
| Chairman | 2023 |
| Board of Directors | 2024 |
| Former (20) |
| Board of Directors | 1996 – 2005 |
| Board of Directors | 2022 – 2024 |
| Board of Directors | 2018 – 2021 |
| Board of Directors | 2002 – 2007 |
| Board of Directors | 2021 – 2022 |
| Board of Directors | 1970 – 1989 |
| Board of Directors | 2014 – 2017 |
| Chairman | 2012 – 2017 |
| Board of Directors | 2017 – 2018 |
| Chairman | 2021 – 2023 |
| Chairman | 2007 – 2012 |
| Board of Directors | 2017 – 2018 |
| Board of Directors | 2018 – 2019 |
| Chairman | 2017 – 2021 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 2012 – 2017 |
| Chairman | 1970 – 2007 |
| Board of Directors | 2007 – 2014 |
| Board of Directors | 1996 – 2002 |
| Board of Directors | 1970 – 1991 |