| Former (17) |
| Board of Directors | 2004 – 2006 |
| Chairman | 2015 – 2019 |
| Board of Directors | 2013 – 2014 |
| Chairman | 2003 – 2003 |
| Board of Directors | 2015 – 2016 |
| Chairman | 2014 – 2015 |
| Board of Directors | 2006 – 2013 |
| Chairman | 2013 – 2014 |
| Chairman | 2019 – 2019 |
| Chairman | 2005 – 2007 |
| Chairman | 2007 – 2010 |
| Board of Directors | 2015 – 2019 |
| Chairman | 2004 – 2005 |
| Board of Directors | 2003 – 2003 |
| Board of Directors | 2014 – 2015 |
| Chairman | 2010 – 2013 |
| Board of Directors | 2006 – 2013 |