| Current (2) |
| Chairman | 2014 |
| Deputy Chairman | 2024 |
| Former (14) |
| Deputy Chairman | 2007 – 2021 |
| Board of Directors | 2003 – 2007 |
| Board of Directors | 1970 – 1991 |
| Chairman | 2010 – 2014 |
| Deputy Chairman | 2023 – 2024 |
| Board of Directors | 1970 – 1999 |
| Chairman | 2007 – 2009 |
| Board of Directors | 1995 – 2003 |
| Board of Directors | 1970 – 2003 |
| Board of Directors | 1970 – 1996 |
| Chairman | 2009 – 2010 |
| Board of Directors | 1970 – 1992 |
| Board of Directors | 1998 – 2003 |
| Deputy Chairman | 2021 – 2023 |