| Former (19) |
| Chairman | 2004 – 2004 |
| Board of Directors | 1985 – 1994 |
| Board of Directors | 2003 – 2004 |
| Chairman | 1985 – 1997 |
| Board of Directors | 2004 – 2010 |
| Board of Directors | 2022 – 2024 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 1993 – 1998 |
| Chairman | 2004 – 2024 |
| Board of Directors | 1985 – 1993 |
| Board of Directors | 1998 – 2004 |
| Board of Directors | 2011 – 2017 |
| Chairman | 1985 – 2004 |
| Board of Directors | 1985 – 1992 |
| Deputy Chairman | 1998 – 1998 |
| Board of Directors | 1985 – 1995 |
| Board of Directors | 2010 – 2022 |
| Deputy Chairman | 1995 – 1998 |