| Chairman | 1982 – 1995 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 1982 – 1998 |
| Board of Directors | 2001 – 2006 |
| Board of Directors | 1982 – 1989 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 1982 – 2001 |
| Board of Directors | 1982 – 1992 |
| Chairman | 2005 – 2010 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 1982 – 1989 |
| Board of Directors | 1982 – 1994 |
| Chairman | 1982 – 1989 |
| Board of Directors | 1982 – 2001 |
| Board of Directors | 1982 – 1992 |