| Current (6) |
| Chairman | 2022 |
| Board of Directors | 2019 |
| Board of Directors | 2023 |
| Board of Directors | 2023 |
| Board of Directors | 2023 |
| Board of Directors | 2019 |
| Former (21) |
| Chairman | 2008 – 2017 |
| Chairman | 1998 – 2008 |
| Board of Directors | 1998 – 2008 |
| Chairman | 1983 – 2001 |
| Board of Directors | 1983 – 1998 |
| Deputy Chairman | 2021 – 2023 |
| Board of Directors | 2008 – 2019 |
| Board of Directors | 2007 – 2012 |
| Chairman | 2018 – 2018 |
| Board of Directors | 2014 – 2022 |
| Chairman | 2017 – 2018 |
| Chairman | 2022 – 2022 |
| Board of Directors | 2020 – 2022 |
| Chairman | 2020 – 2022 |
| Board of Directors | 1998 – 2017 |
| Chairman | 2018 – 2020 |
| Board of Directors | 1983 – 2007 |
| Board of Directors | 1998 – 2008 |
| Board of Directors | 2015 – 2019 |
| Board of Directors | 2014 – 2015 |
| Board of Directors | 2014 – 2015 |