| Chairman | 1985 – 1991 |
| Board of Directors | 1997 – 2004 |
| Board of Directors | 1985 – 1991 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1985 – 1988 |
| Chairman | 1997 – 1998 |
| Board of Directors | 2004 – 2005 |
| Chairman | 1998 – 2005 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 1985 – 2005 |
| Chairman | 1985 – 1997 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 1985 – 1988 |
| Board of Directors | 2000 – 2005 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 2004 – 2004 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 1985 – 2002 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1996 – 2006 |
| Chairman | 2005 – 2006 |