| Former (29) |
| Chairman | 2006 – 2008 |
| Chairman | 1987 – 1995 |
| Board of Directors | 1987 – 1988 |
| Board of Directors | 1987 – 1992 |
| Board of Directors | 2004 – 2005 |
| Board of Directors | 1987 – 1992 |
| Board of Directors | 1987 – 1993 |
| Board of Directors | 1987 – 2001 |
| Board of Directors | 1987 – 1989 |
| Board of Directors | 2010 – 2014 |
| Deputy Chairman | 2004 – 2005 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 1987 – 1988 |
| Chairman | 1995 – 2003 |
| Chairman | 2005 – 2006 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 1987 – 1988 |
| Chairman | 2008 – 2010 |
| Chairman | 2010 – 2014 |
| Chairman | 1987 – 1988 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1995 – 2003 |
| Board of Directors | 1987 – 1994 |
| Deputy Chairman | 2006 – 2009 |