| Former (18) |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 2012 – 2013 |
| Board of Directors | 1982 – 1994 |
| Chairman | 2006 – 2013 |
| Chairman | 2001 – 2006 |
| Board of Directors | 1998 – 2000 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 1982 – 1989 |
| Board of Directors | 1982 – 1994 |
| Chairman | 2006 – 2012 |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1982 – 1992 |
| Chairman | 2000 – 2001 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1999 – 2000 |