| Current (3) |
| Board of Directors | 2021 |
| Chairman | 2026 |
| Board of Directors | 2021 |
| Former (28) |
| Board of Directors | 2006 – 2007 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 2006 – 2009 |
| Board of Directors | 2009 – 2019 |
| Board of Directors | 2000 – 2003 |
| Deputy Chairman | 2006 – 2008 |
| Chairman | 2003 – 2013 |
| Chairman | 2018 – 2026 |
| Board of Directors | 2011 – 2013 |
| Board of Directors | 2019 – 2021 |
| Chairman | 2015 – 2018 |
| Chairman | 2013 – 2015 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2006 – 2012 |
| Chairman | 1988 – 1997 |
| Deputy Chairman | 1988 – 1997 |
| Board of Directors | 2000 – 2011 |
| Chairman | 1997 – 2003 |
| Board of Directors | 1988 – 1995 |
| Deputy Chairman | 2003 – 2006 |
| Board of Directors | 2003 – 2006 |
| Deputy Chairman | 2015 – 2018 |
| Board of Directors | 2003 – 2006 |
| Board of Directors | 1988 – 2000 |
| Board of Directors | 2017 – 2018 |
| Board of Directors | 2000 – 2002 |
| Deputy Chairman | 2008 – 2011 |
| Deputy Chairman | 1997 – 2000 |
