| Chairman | 2000 – 2002 |
| Board of Directors | 1980 – 1994 |
| Board of Directors | 1980 – 1995 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 1980 – 1996 |
| Board of Directors | 1980 – 1991 |
| Board of Directors | 1980 – 2000 |
| Board of Directors | 1980 – 1988 |
| Board of Directors | 1999 – 2000 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 2000 – 2006 |
| Board of Directors | 1980 – 1991 |
| Board of Directors | 1980 – 2002 |
| Board of Directors | 1995 – 2000 |
| Board of Directors | 1980 – 1996 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 2003 – 2006 |
| Board of Directors | 1980 – 1989 |
| Board of Directors | 1980 – 1988 |
| Chairman | 2002 – 2006 |