| Board of Directors | 1978 – 1990 |
| Board of Directors | 1998 – 2003 |
| Board of Directors | 1978 – 1991 |
| Board of Directors | 1978 – 1990 |
| Board of Directors | 1978 – 1988 |
| Board of Directors | 2003 – 2008 |
| Board of Directors | 1978 – 1990 |
| Chairman | 1998 – 2008 |
| Board of Directors | 1978 – 1990 |
| Board of Directors | 1978 – 1990 |
| Board of Directors | 1978 – 1998 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 1978 – 1988 |
| Board of Directors | 1978 – 1992 |
| Board of Directors | 1978 – 2004 |
| Board of Directors | 1978 – 1996 |
| Board of Directors | 1978 – 1988 |
| Board of Directors | 2004 – 2005 |