| Former (21) |
| Board of Directors | 2011 – 2026 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1951 – 2001 |
| Board of Directors | 1951 – 1994 |
| Board of Directors | 1951 – 1992 |
| Chairman | 2011 – 2023 |
| Board of Directors | 2011 – 2023 |
| Chairman | 2023 – 2026 |
| Board of Directors | 2011 – 2022 |
| Board of Directors | 2007 – 2011 |
| Board of Directors | 1951 – 1993 |
| Board of Directors | 2023 – 2026 |
| Board of Directors | 2023 – 2026 |
| Board of Directors | 2011 – 2022 |
| Chairman | 1951 – 2011 |
| Deputy Chairman | 2007 – 2011 |
| Board of Directors | 1951 – 1992 |
| Board of Directors | 1996 – 2001 |
| Board of Directors | 1951 – 2001 |
| Board of Directors | 1951 – 1996 |
| Board of Directors | 2003 – 2011 |