| Current (2) |
| Board of Directors | 2026 |
| Chairman | 2026 |
| Former (17) |
| Chairman | 2020 – 2026 |
| Board of Directors | 1988 – 2001 |
| Board of Directors | 2015 – 2015 |
| Board of Directors | 1988 – 1990 |
| Board of Directors | 1988 – 1988 |
| Chairman | 2006 – 2016 |
| Board of Directors | 1988 – 2016 |
| Board of Directors | 2006 – 2011 |
| Chairman | 1998 – 2006 |
| Chairman | 2017 – 2020 |
| Board of Directors | 1988 – 2006 |
| Deputy Chairman | 2019 – 2026 |
| Chairman | 2020 – 2020 |
| Chairman | 1988 – 1990 |
| Board of Directors | 1988 – 1990 |
| Chairman | 1988 – 1988 |
| Chairman | 2016 – 2017 |