| Board of Directors | 2006 – 2007 |
| Board of Directors | 1999 – 2008 |
| Board of Directors | 1980 – 1999 |
| Board of Directors | 1999 – 2006 |
| Board of Directors | 2002 – 2004 |
| Chairman | 2007 – 2007 |
| Board of Directors | 1981 – 1993 |
| Board of Directors | 1981 – 2002 |
| Chairman | 2007 – 2008 |
| Chairman | 2007 – 2007 |
| Board of Directors | 2004 – 2007 |
| Board of Directors | 1981 – 1999 |
| Board of Directors | 2007 – 2007 |
| Board of Directors | 2007 – 2008 |