| Board of Directors | 2003 – 2006 |
| Board of Directors | 2009 – 2017 |
| Board of Directors | 2018 – 2023 |
| Board of Directors | 2014 – 2018 |
| Board of Directors | 1949 – 1998 |
| Chairman | 1949 – 2025 |
| Board of Directors | 1949 – 1991 |
| Board of Directors | 2017 – 2025 |
| Board of Directors | 1949 – 1987 |
| Board of Directors | 2023 – 2025 |
| Board of Directors | 1949 – 1998 |
| Board of Directors | 2004 – 2025 |
| Board of Directors | 2001 – 2004 |
| Chairman | 1949 – 1987 |
| Board of Directors | 1949 – 2002 |
| Board of Directors | 2002 – 2008 |
| Board of Directors | 1998 – 2003 |
| Board of Directors | 1949 – 1989 |
| Board of Directors | 2006 – 2014 |
| Board of Directors | 1949 – 1995 |
| Board of Directors | 1949 – 2020 |