| Current (5) |
| Chairman | 2023 |
| Board of Directors | 2023 |
| Board of Directors | 2024 |
| Board of Directors | 2007 |
| Board of Directors | 2007 |
| Former (12) |
| Chairman | 2000 – 2023 |
| Board of Directors | 2004 – 2007 |
| Board of Directors | 1986 – 2009 |
| Board of Directors | 2012 – 2020 |
| Board of Directors | 2001 – 2012 |
| Board of Directors | 2003 – 2004 |
| Board of Directors | 1986 – 2007 |
| Board of Directors | 1986 – 2003 |
| Chairman | 1996 – 2000 |
| Board of Directors | 1986 – 1999 |
| Board of Directors | 1986 – 1996 |
| Board of Directors | 1999 – 2007 |