| Current (3) |
| Chairman | 2013 |
| Board of Directors | 2024 |
| Board of Directors | 2019 |
| Former (19) |
| Board of Directors | 2013 – 2016 |
| Board of Directors | 1965 – 1993 |
| Board of Directors | 1996 – 1996 |
| Board of Directors | 2016 – 2019 |
| Board of Directors | 1997 – 2011 |
| Chairman | 1992 – 1993 |
| Board of Directors | 1996 – 2001 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 1996 – 1996 |
| Board of Directors | 1965 – 1992 |
| Deputy Chairman | 1965 – 1992 |
| Chairman | 2001 – 2011 |
| Board of Directors | 1965 – 1993 |
| Board of Directors | 1965 – 1996 |
| Board of Directors | 1996 – 1996 |
| Chairman | 1965 – 1996 |
| Deputy Chairman | 1965 – 1996 |
| Chairman | 2011 – 2013 |
| Board of Directors | 1996 – 2001 |