| Former (16) |
| Board of Directors | 2023 – 2024 |
| Board of Directors | 2012 – 2014 |
| Board of Directors | 2008 – 2009 |
| Board of Directors | 2017 – 2022 |
| Board of Directors | 2014 – 2019 |
| Board of Directors | 2001 – 2004 |
| Board of Directors | 1986 – 2007 |
| Board of Directors | 1998 – 2000 |
| Chairman | 2007 – 2007 |
| Board of Directors | 2004 – 2017 |
| Chairman | 2018 – 2019 |
| Chairman | 2023 – 2024 |
| Board of Directors | 1986 – 1995 |
| Chairman | 2019 – 2023 |
| Board of Directors | 2009 – 2012 |
| Board of Directors | 2007 – 2008 |