| Former (16) |
| Board of Directors | 2004 – 2007 |
| Board of Directors | 1988 – 1991 |
| Chairman | 2004 – 2012 |
| Board of Directors | 1988 – 1989 |
| Chairman | 2004 – 2004 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 1988 – 1997 |
| Board of Directors | 1988 – 1996 |
| Chairman | 1988 – 1997 |
| Board of Directors | 1988 – 1995 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 2007 – 2007 |
| Chairman | 1988 – 1989 |
| Board of Directors | 2000 – 2004 |