| Board of Directors | 2002 – 2010 |
| Board of Directors | 1987 – 1988 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1995 – 2000 |
| Board of Directors | 1987 – 1995 |
| Board of Directors | 2007 – 2014 |
| Board of Directors | 1987 – 1988 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 2003 – 2006 |
| Board of Directors | 1987 – 1988 |
| Board of Directors | 2001 – 2017 |
| Board of Directors | 2003 – 2007 |
| Board of Directors | 1987 – 2000 |
| Board of Directors | 1987 – 1990 |
| Board of Directors | 2002 – 2003 |