| Current (2) |
| Chairman | 2024 |
| Board of Directors | 2023 |
| Former (15) |
| Chairman | 2005 – 2005 |
| Chairman | 1990 – 2003 |
| Board of Directors | 2020 – 2020 |
| Board of Directors | 1990 – 2012 |
| Board of Directors | 2012 – 2014 |
| Chairman | 1990 – 1992 |
| Board of Directors | 1990 – 1991 |
| Chairman | 2005 – 2010 |
| Board of Directors | 1990 – 1992 |
| Board of Directors | 2018 – 2020 |
| Board of Directors | 2020 – 2023 |
| Board of Directors | 1990 – 2005 |
| Board of Directors | 2014 – 2016 |
| Chairman | 2010 – 2012 |
| Board of Directors | 2010 – 2020 |