| Current (2) |
| Chairman | 2024 |
| Board of Directors | 2026 |
| Former (20) |
| Deputy Chairman | 2004 – 2005 |
| Board of Directors | 1990 – 1991 |
| Chairman | 2004 – 2005 |
| Board of Directors | 2005 – 2015 |
| Board of Directors | 2005 – 2009 |
| Board of Directors | 2016 – 2024 |
| Deputy Chairman | 2005 – 2009 |
| Chairman | 2008 – 2010 |
| Chairman | 2015 – 2016 |
| Deputy Chairman | 2009 – 2015 |
| Board of Directors | 2017 – 2022 |
| Chairman | 2005 – 2008 |
| Board of Directors | 2015 – 2017 |
| Board of Directors | 1998 – 2004 |
| Board of Directors | 2024 – 2026 |
| Deputy Chairman | 1990 – 1998 |
| Board of Directors | 2015 – 2024 |
| Chairman | 2016 – 2024 |
| Chairman | 2010 – 2015 |
| Board of Directors | 1990 – 2002 |