| Deputy Chairman | 2005 – 2007 |
| Board of Directors | 2003 – 2004 |
| Board of Directors | 1979 – 1990 |
| Deputy Chairman | 1979 – 2003 |
| Board of Directors | 1979 – 1992 |
| Board of Directors | 1979 – 1994 |
| Board of Directors | 1979 – 1998 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1998 – 2004 |
| Board of Directors | 2004 – 2007 |
| Board of Directors | 1979 – 2007 |
| Board of Directors | 1979 – 1993 |
| Deputy Chairman | 2004 – 2005 |
| Chairman | 1979 – 2003 |
| Deputy Chairman | 2003 – 2004 |
| Chairman | 2004 – 2007 |
| Board of Directors | 1979 – 1992 |
| Board of Directors | 1979 – 1994 |
| Board of Directors | 1979 – 1990 |
| Board of Directors | 1979 – 2003 |
| Board of Directors | 1979 – 1994 |
| Board of Directors | 1979 – 1995 |
| Chairman | 2003 – 2004 |
| Board of Directors | 2004 – 2005 |