| Former (16) |
| Board of Directors | 2002 – 2005 |
| Board of Directors | 1994 – 2022 |
| Board of Directors | 1969 – 1995 |
| Chairman | 1994 – 2008 |
| Board of Directors | 1969 – 1989 |
| Deputy Chairman | 1969 – 1989 |
| Board of Directors | 1969 – 1994 |
| Board of Directors | 2004 – 2008 |
| Board of Directors | 2009 – 2022 |
| Board of Directors | 1969 – 1989 |
| Chairman | 1969 – 1989 |
| Chairman | 1969 – 1993 |
| Board of Directors | 1969 – 1989 |
| Board of Directors | 1994 – 1998 |
| Board of Directors | 1969 – 1997 |
| Board of Directors | 1969 – 1993 |
