| Current (2) |
| Chairman | 2023 |
| Board of Directors | 2023 |
| Former (20) |
| Board of Directors | 1939 – 2003 |
| Board of Directors | 2011 – 2015 |
| Board of Directors | 1939 – 2009 |
| Chairman | 2005 – 2009 |
| Deputy Chairman | 2021 – 2022 |
| Deputy Chairman | 2015 – 2020 |
| Board of Directors | 2012 – 2015 |
| Chairman | 2015 – 2018 |
| Board of Directors | 2009 – 2012 |
| Board of Directors | 1999 – 2009 |
| Board of Directors | 2015 – 2019 |
| Board of Directors | 2018 – 2021 |
| Chairman | 2022 – 2023 |
| Board of Directors | 2015 – 2016 |
| Board of Directors | 1939 – 1998 |
| Deputy Chairman | 2009 – 2015 |
| Board of Directors | 2016 – 2020 |
| Board of Directors | 2000 – 2003 |
| Chairman | 1939 – 2005 |
| Board of Directors | 2012 – 2015 |