| Board of Directors | 2002 – 2003 |
| Board of Directors | 2003 – 2012 |
| Board of Directors | 1988 – 1991 |
| Board of Directors | 1988 – 1988 |
| Chairman | 1988 – 2000 |
| Board of Directors | 1988 – 1999 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2003 – 2005 |
| Deputy Chairman | 2002 – 2004 |
| Board of Directors | 1988 – 2002 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 1997 – 2001 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2006 – 2012 |
| Board of Directors | 2000 – 2000 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 1988 – 1993 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 2002 – 2005 |
| Board of Directors | 1988 – 1997 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1988 – 2002 |
| Board of Directors | 1988 – 1994 |
| Deputy Chairman | 1997 – 2001 |
| Board of Directors | 2002 – 2002 |
| Chairman | 2002 – 2006 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 1988 – 1988 |
| Board of Directors | 1997 – 2000 |
| Board of Directors | 2003 – 2004 |
| Chairman | 2000 – 2002 |
| Chairman | 2006 – 2012 |