| Current (2) |
| Chairman | 2024 |
| Board of Directors | 2010 |
| Former (13) |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 1987 – 1987 |
| Board of Directors | 1987 – 1996 |
| Board of Directors | 1987 – 2001 |
| Board of Directors | 1987 – 1997 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 1996 – 1996 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 1997 – 2006 |
| Chairman | 1987 – 1987 |