| Current (5) |
| Chairman | 2003 |
| Board of Directors | 2023 |
| Deputy Chairman | 2025 |
| Board of Directors | 2002 |
| Board of Directors | 2022 |
| Former (10) |
| Deputy Chairman | 2003 – 2010 |
| Board of Directors | 1999 – 2014 |
| Board of Directors | 1986 – 2008 |
| Board of Directors | 1986 – 2002 |
| Deputy Chairman | 2014 – 2023 |
| Board of Directors | 1986 – 1990 |
| Board of Directors | 2014 – 2022 |
| Deputy Chairman | 1986 – 2003 |
| Board of Directors | 1986 – 1999 |
| Deputy Chairman | 2023 – 2025 |