| Board of Directors | 2006 – 2012 |
| Chairman | 2005 – 2006 |
| Board of Directors | 1983 – 1999 |
| Board of Directors | 1983 – 2002 |
| Board of Directors | 1983 – 1995 |
| Board of Directors | 1983 – 1995 |
| Board of Directors | 1983 – 1991 |
| Board of Directors | 1983 – 1996 |
| Board of Directors | 1983 – 2003 |
| Board of Directors | 1997 – 2005 |
| Board of Directors | 1983 – 1991 |
| Board of Directors | 2006 – 2012 |
| Board of Directors | 1983 – 1996 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1983 – 1995 |
| Board of Directors | 1983 – 1997 |
| Board of Directors | 2003 – 2006 |
| Board of Directors | 2006 – 2012 |