| Board of Directors | 1978 – 1989 |
| Board of Directors | 1993 – 1995 |
| Board of Directors | 2006 – 2008 |
| Chairman | 1978 – 1989 |
| Board of Directors | 2002 – 2008 |
| Chairman | 1998 – 1999 |
| Board of Directors | 1995 – 2007 |
| Board of Directors | 1978 – 1993 |
| Board of Directors | 1995 – 2006 |
| Board of Directors | 1978 – 1995 |
| Board of Directors | 1993 – 1995 |
| Chairman | 1995 – 1998 |
| Board of Directors | 1978 – 1990 |
| Board of Directors | 1978 – 1992 |
| Board of Directors | 1978 – 1988 |
| Board of Directors | 1978 – 1989 |
| Chairman | 1978 – 1990 |
| Board of Directors | 1978 – 1995 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1978 – 1993 |
| Board of Directors | 1978 – 1989 |
| Board of Directors | 2008 – 2008 |
| Board of Directors | 1999 – 2002 |
| Board of Directors | 1978 – 1989 |
| Board of Directors | 1978 – 1995 |