| Former (17) |
| Board of Directors | 1995 – 1998 |
| Board of Directors | 1983 – 1995 |
| Chairman | 2003 – 2016 |
| Chairman | 2002 – 2003 |
| Chairman | 1983 – 1991 |
| Board of Directors | 1983 – 1995 |
| Board of Directors | 1983 – 1992 |
| Board of Directors | 1983 – 1990 |
| Chairman | 1998 – 2002 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 2003 – 2014 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 1983 – 1989 |
| Chairman | 1983 – 1995 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 1995 – 1995 |
| Board of Directors | 1983 – 1992 |