| Former (18) |
| Board of Directors | 2018 – 2022 |
| Board of Directors | 2012 – 2014 |
| Chairman | 1997 – 1997 |
| Chairman | 1999 – 2005 |
| Board of Directors | 2000 – 2005 |
| Board of Directors | 1999 – 2003 |
| Chairman | 2014 – 2016 |
| Chairman | 2007 – 2009 |
| Chairman | 2011 – 2014 |
| Board of Directors | 2016 – 2018 |
| Chairman | 2005 – 2007 |
| Chairman | 2018 – 2022 |
| Board of Directors | 2003 – 2005 |
| Board of Directors | 2007 – 2008 |
| Chairman | 2018 – 2018 |
| Chairman | 2009 – 2011 |
| Board of Directors | 1997 – 1997 |
| Board of Directors | 2006 – 2009 |