| Former (19) |
| Board of Directors | 1996 – 1998 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 1995 – 1996 |
| Chairman | 2009 – 2013 |
| Deputy Chairman | 1989 – 1995 |
| Board of Directors | 1998 – 2002 |
| Deputy Chairman | 1997 – 1998 |
| Chairman | 2000 – 2003 |
| Board of Directors | 1998 – 1998 |
| Deputy Chairman | 2009 – 2013 |
| Deputy Chairman | 2002 – 2004 |
| Deputy Chairman | 2000 – 2001 |
| Chairman | 1997 – 1999 |
| Board of Directors | 1998 – 2013 |
| Board of Directors | 1995 – 1999 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2003 – 2004 |
| Board of Directors | 1989 – 1993 |
| Board of Directors | 1989 – 1995 |