| Current (3) |
| Board of Directors | 2024 |
| Chairman | 2023 |
| Board of Directors | 2018 |
| Former (15) |
| Board of Directors | 2005 – 2005 |
| Board of Directors | 1984 – 1996 |
| Chairman | 1984 – 2003 |
| Board of Directors | 1984 – 2005 |
| Board of Directors | 1984 – 1993 |
| Board of Directors | 1984 – 2005 |
| Board of Directors | 2016 – 2018 |
| Board of Directors | 1984 – 1998 |
| Chairman | 2005 – 2009 |
| Board of Directors | 2003 – 2005 |
| Chairman | 2020 – 2023 |
| Board of Directors | 2013 – 2016 |
| Chairman | 2018 – 2020 |
| Chairman | 2003 – 2005 |
| Chairman | 2009 – 2017 |