| Former (18) |
| Chairman | 2008 – 2012 |
| Board of Directors | 2000 – 2002 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 2000 – 2000 |
| Board of Directors | 2000 – 2006 |
| Board of Directors | 1986 – 1991 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1986 – 2000 |
| Board of Directors | 1986 – 1991 |
| Board of Directors | 1986 – 1988 |
| Chairman | 2006 – 2007 |
| Board of Directors | 1986 – 1993 |
| Board of Directors | 1986 – 1995 |
| Board of Directors | 2006 – 2007 |
| Chairman | 1986 – 1995 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1986 – 1995 |
| Chairman | 1986 – 1988 |