| Current (2) |
| Chairman | 2022 |
| Board of Directors | 2024 |
| Former (25) |
| Board of Directors | 1969 – 2001 |
| Chairman | 2016 – 2017 |
| Board of Directors | 1996 – 2006 |
| Board of Directors | 1969 – 1989 |
| Chairman | 2013 – 2015 |
| Board of Directors | 1969 – 1996 |
| Chairman | 2017 – 2022 |
| Board of Directors | 1969 – 1992 |
| Board of Directors | 1969 – 1992 |
| Board of Directors | 1969 – 1992 |
| Board of Directors | 1969 – 1989 |
| Board of Directors | 2006 – 2016 |
| Deputy Chairman | 2016 – 2020 |
| Chairman | 1969 – 2003 |
| Deputy Chairman | 2022 – 2023 |
| Chairman | 2010 – 2013 |
| Board of Directors | 1969 – 1996 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 1969 – 1995 |
| Board of Directors | 2017 – 2020 |
| Deputy Chairman | 2023 – 2024 |
| Board of Directors | 1969 – 1992 |
| Deputy Chairman | 2010 – 2016 |
| Board of Directors | 1969 – 1995 |
| Chairman | 2003 – 2008 |