| Current (2) |
| Chairman | 2022 |
| Board of Directors | 2022 |
| Former (12) |
| Board of Directors | 2002 – 2002 |
| Board of Directors | 1979 – 1990 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 2011 – 2022 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1979 – 1998 |
| Board of Directors | 1979 – 1994 |
| Board of Directors | 2002 – 2003 |
| Chairman | 1979 – 2011 |
| Board of Directors | 1979 – 1996 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 1979 – 1994 |