| Board of Directors | 1979 – 2009 |
| Board of Directors | 1979 – 1998 |
| Board of Directors | 1979 – 2002 |
| Board of Directors | 1979 – 1996 |
| Board of Directors | 2002 – 2009 |
| Board of Directors | 1979 – 1993 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 1979 – 2000 |
| Board of Directors | 1979 – 1990 |
| Chairman | 2000 – 2008 |
| Board of Directors | 1979 – 1988 |
| Chairman | 2009 – 2011 |
| Board of Directors | 2008 – 2011 |