| Chairman | 2015 – 2018 |
| Board of Directors | 2007 – 2014 |
| Chairman | 2001 – 2004 |
| Board of Directors | 2004 – 2014 |
| Chairman | 2014 – 2015 |
| Board of Directors | 2000 – 2000 |
| Board of Directors | 2000 – 2015 |
| Board of Directors | 2000 – 2002 |
| Chairman | 2008 – 2014 |
| Board of Directors | 2001 – 2002 |
| Chairman | 2004 – 2006 |
| Chairman | 2006 – 2007 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 2004 – 2014 |
| Board of Directors | 2015 – 2018 |