| Current (5) |
| Chairman | 2008 |
| Board of Directors | 2021 |
| Deputy Chairman | 2026 |
| Board of Directors | 2009 |
| Board of Directors | 2026 |
| Former (20) |
| Board of Directors | 2007 – 2008 |
| Chairman | 1989 – 1998 |
| Board of Directors | 1993 – 2007 |
| Board of Directors | 2011 – 2014 |
| Board of Directors | 2014 – 2017 |
| Board of Directors | 1996 – 2011 |
| Board of Directors | 1989 – 2009 |
| Board of Directors | 1989 – 1993 |
| Deputy Chairman | 2018 – 2022 |
| Board of Directors | 1989 – 1991 |
| Chairman | 1998 – 2007 |
| Board of Directors | 2018 – 2021 |
| Board of Directors | 1989 – 1990 |
| Deputy Chairman | 2022 – 2026 |
| Board of Directors | 1989 – 1993 |
| Chairman | 1989 – 1996 |
| Chairman | 1989 – 1990 |
| Board of Directors | 1989 – 1993 |
| Board of Directors | 2007 – 2017 |
| Board of Directors | 2017 – 2018 |