| Current (2) |
| Board of Directors | 1999 |
| Board of Directors | 2023 |
| Former (14) |
| Board of Directors | 1982 – 1994 |
| Chairman | 1995 – 1997 |
| Chairman | 1997 – 1999 |
| Board of Directors | 2009 – 2011 |
| Board of Directors | 2000 – 2009 |
| Board of Directors | 2002 – 2003 |
| Board of Directors | 2016 – 2023 |
| Board of Directors | 2013 – 2016 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 1982 – 1995 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 1999 – 2009 |
| Board of Directors | 1999 – 1999 |