| Current (7) |
| Board of Directors | 2022 |
| Board of Directors | 2021 |
| Board of Directors | 2023 |
| Board of Directors | 2017 |
| Board of Directors | 2021 |
| Chairman | 2016 |
| Board of Directors | 2024 |
| Former (26) |
| Chairman | 1996 – 2004 |
| Board of Directors | 1997 – 2009 |
| Board of Directors | 2016 – 2021 |
| Board of Directors | 1997 – 2011 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 2002 – 2011 |
| Board of Directors | 1978 – 2002 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1978 – 2000 |
| Board of Directors | 1978 – 2005 |
| Board of Directors | 1997 – 2009 |
| Deputy Chairman | 2016 – 2023 |
| Board of Directors | 2006 – 2017 |
| Chairman | 2002 – 2016 |
| Board of Directors | 1978 – 1996 |
| Board of Directors | 1978 – 1997 |
| Board of Directors | 2009 – 2016 |
| Board of Directors | 1978 – 1996 |
| Board of Directors | 2009 – 2011 |
| Board of Directors | 2016 – 2024 |
| Board of Directors | 1978 – 1997 |
| Board of Directors | 2000 – 2006 |
| Board of Directors | 2014 – 2022 |
| Board of Directors | 1978 – 2007 |
| Deputy Chairman | 1996 – 2008 |
| Board of Directors | 2006 – 2011 |