| Current (3) |
| Chairman | 2024 |
| Board of Directors | 2019 |
| Deputy Chairman | 2026 |
| Former (24) |
| Board of Directors | 1975 – 1997 |
| Board of Directors | 2008 – 2010 |
| Board of Directors | 1975 – 1994 |
| Board of Directors | 1975 – 1994 |
| Chairman | 2004 – 2024 |
| Board of Directors | 2000 – 2007 |
| Board of Directors | 2008 – 2010 |
| Chairman | 1997 – 2004 |
| Board of Directors | 1999 – 2000 |
| Board of Directors | 1998 – 2005 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1975 – 1997 |
| Deputy Chairman | 2017 – 2020 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1975 – 1994 |
| Board of Directors | 1975 – 1989 |
| Board of Directors | 1975 – 1989 |
| Board of Directors | 2007 – 2016 |
| Board of Directors | 1975 – 1992 |
| Board of Directors | 1975 – 1994 |
| Deputy Chairman | 2020 – 2026 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 2013 – 2017 |
| Board of Directors | 1997 – 1998 |