| Current (2) |
| Board of Directors | 2026 |
| Chairman | 2026 |
| Former (27) |
| Board of Directors | 1983 – 1994 |
| Chairman | 2014 – 2018 |
| Board of Directors | 2002 – 2007 |
| Deputy Chairman | 1983 – 1992 |
| Board of Directors | 2017 – 2019 |
| Board of Directors | 2021 – 2025 |
| Board of Directors | 1999 – 2002 |
| Board of Directors | 2025 – 2026 |
| Board of Directors | 1983 – 1994 |
| Chairman | 2018 – 2019 |
| Board of Directors | 1983 – 1994 |
| Board of Directors | 2011 – 2015 |
| Chairman | 1983 – 1992 |
| Board of Directors | 2022 – 2026 |
| Deputy Chairman | 1983 – 1996 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 2019 – 2021 |
| Deputy Chairman | 1983 – 1999 |
| Board of Directors | 2006 – 2007 |
| Chairman | 2011 – 2014 |
| Board of Directors | 2007 – 2011 |
| Chairman | 2019 – 2021 |
| Board of Directors | 1983 – 1994 |
| Chairman | 2006 – 2011 |
| Chairman | 1998 – 2002 |
| Board of Directors | 2014 – 2017 |
| Chairman | 1983 – 1998 |