| Former (15) |
| Board of Directors | 2008 – 2009 |
| Chairman | 1983 – 2000 |
| Board of Directors | 2023 – 2025 |
| Chairman | 2008 – 2016 |
| Chairman | 2023 – 2025 |
| Board of Directors | 2016 – 2025 |
| Board of Directors | 1983 – 1998 |
| Board of Directors | 1983 – 1996 |
| Board of Directors | 2009 – 2012 |
| Board of Directors | 1983 – 2006 |
| Deputy Chairman | 2022 – 2025 |
| Board of Directors | 1983 – 2008 |
| Board of Directors | 2010 – 2014 |
| Chairman | 2016 – 2023 |
| Board of Directors | 2013 – 2017 |