| Current (3) |
| Board of Directors | 2024 |
| Chairman | 2023 |
| Board of Directors | 2021 |
| Former (30) |
| Chairman | 2012 – 2012 |
| Board of Directors | 1982 – 1996 |
| Chairman | 2020 – 2021 |
| Chairman | 1999 – 2006 |
| Board of Directors | 2020 – 2021 |
| Board of Directors | 2012 – 2013 |
| Board of Directors | 1996 – 1999 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 1982 – 1992 |
| Chairman | 2007 – 2008 |
| Chairman | 2018 – 2019 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 1982 – 1995 |
| Board of Directors | 1982 – 1996 |
| Board of Directors | 2009 – 2024 |
| Chairman | 2009 – 2012 |
| Board of Directors | 2014 – 2015 |
| Chairman | 2008 – 2009 |
| Chairman | 2006 – 2007 |
| Board of Directors | 1999 – 2009 |
| Board of Directors | 1982 – 1990 |
| Board of Directors | 1998 – 1999 |
| Chairman | 2021 – 2023 |
| Board of Directors | 2012 – 2015 |
| Chairman | 2019 – 2020 |
| Board of Directors | 1982 – 1991 |
| Board of Directors | 1996 – 1998 |
| Board of Directors | 1982 – 1988 |
| Board of Directors | 1982 – 1993 |
| Chairman | 2012 – 2018 |