| Former (15) |
| Chairman | 2003 – 2006 |
| Chairman | 1997 – 1999 |
| Board of Directors | 2018 – 2021 |
| Chairman | 2006 – 2014 |
| Board of Directors | 1958 – 1988 |
| Board of Directors | 2017 – 2018 |
| Chairman | 2021 – 2021 |
| Board of Directors | 1958 – 1993 |
| Board of Directors | 2003 – 2017 |
| Board of Directors | 1958 – 1999 |
| Board of Directors | 1958 – 1997 |
| Chairman | 2014 – 2018 |
| Chairman | 2002 – 2003 |
| Board of Directors | 2001 – 2003 |
| Chairman | 2019 – 2021 |