| Current (2) |
| Board of Directors | 2023 |
| Chairman | 2024 |
| Former (16) |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 2001 – 2005 |
| Board of Directors | 2005 – 2009 |
| Board of Directors | 1980 – 1999 |
| Board of Directors | 1980 – 1997 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1980 – 1993 |
| Board of Directors | 1980 – 1999 |
| Board of Directors | 2009 – 2014 |
| Board of Directors | 1980 – 2001 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 1980 – 1993 |
| Chairman | 2004 – 2005 |
| Board of Directors | 1999 – 2004 |
| Board of Directors | 2008 – 2018 |
| Board of Directors | 1980 – 1993 |