| Board of Directors | 1988 – 2000 |
| Board of Directors | 2003 – 2011 |
| Board of Directors | 1988 – 1993 |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 1988 – 1997 |
| Chairman | 1988 – 1993 |
| Board of Directors | 2000 – 2004 |
| Board of Directors | 1988 – 1993 |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 1988 – 1993 |
| Chairman | 2008 – 2010 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 2003 – 2008 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1988 – 2008 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1997 – 2001 |
| Board of Directors | 2010 – 2011 |
| Chairman | 1988 – 1989 |