| Board of Directors | 1979 – 1993 |
| Board of Directors | 1979 – 1998 |
| Board of Directors | 1998 – 2008 |
| Board of Directors | 1979 – 1989 |
| Board of Directors | 1979 – 2002 |
| Board of Directors | 1979 – 1996 |
| Board of Directors | 1979 – 1995 |
| Board of Directors | 1979 – 1993 |
| Board of Directors | 1996 – 1998 |
| Board of Directors | 1979 – 1998 |
| Chairman | 1979 – 2008 |
| Board of Directors | 2002 – 2008 |
| Board of Directors | 1979 – 1989 |