| Current (3) |
| Chairman | 2024 |
| Board of Directors | 2023 |
| Board of Directors | 2023 |
| Former (16) |
| Board of Directors | 2012 – 2015 |
| Board of Directors | 1986 – 2002 |
| Board of Directors | 1986 – 2000 |
| Board of Directors | 1999 – 2007 |
| Board of Directors | 2000 – 2002 |
| Board of Directors | 2007 – 2015 |
| Board of Directors | 2005 – 2007 |
| Chairman | 2018 – 2022 |
| Board of Directors | 2018 – 2021 |
| Board of Directors | 2021 – 2022 |
| Chairman | 2007 – 2013 |
| Board of Directors | 1986 – 2000 |
| Board of Directors | 2015 – 2018 |
| Chairman | 2005 – 2007 |
| Board of Directors | 1986 – 2002 |
| Board of Directors | 2022 – 2023 |