| Current (2) |
| Board of Directors | 2022 |
| Board of Directors | 2022 |
| Former (19) |
| Chairman | 2013 – 2022 |
| Board of Directors | 2013 – 2019 |
| Board of Directors | 2009 – 2013 |
| Chairman | 2004 – 2006 |
| Chairman | 2001 – 2001 |
| Board of Directors | 2006 – 2008 |
| Chairman | 2003 – 2004 |
| Chairman | 2009 – 2010 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 1999 – 2000 |
| Chairman | 2001 – 2003 |
| Chairman | 2000 – 2001 |
| Chairman | 1999 – 2000 |
| Chairman | 1996 – 1999 |
| Board of Directors | 2008 – 2009 |
| Deputy Chairman | 2013 – 2022 |
| Chairman | 2010 – 2013 |
| Board of Directors | 2008 – 2009 |
| Chairman | 2006 – 2009 |