| Chairman | 2011 – 2018 |
| Chairman | 2006 – 2010 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 2010 – 2018 |
| Board of Directors | 1999 – 2000 |
| Board of Directors | 2002 – 2003 |
| Chairman | 2010 – 2011 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2007 – 2009 |
| Board of Directors | 2003 – 2007 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 2000 – 2003 |
| Board of Directors | 2003 – 2010 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 2011 – 2018 |
| Chairman | 2003 – 2005 |
| Chairman | 2005 – 2006 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 2003 – 2003 |
| Board of Directors | 2010 – 2010 |
| Board of Directors | 1981 – 1997 |
| Board of Directors | 1981 – 1997 |