| Current (2) |
| Chairman | 2017 |
| Board of Directors | 2017 |
| Former (17) |
| Board of Directors | 2009 – 2009 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2013 – 2016 |
| Chairman | 1996 – 1996 |
| Chairman | 2009 – 2015 |
| Board of Directors | 2009 – 2010 |
| Chairman | 2003 – 2005 |
| Chairman | 2001 – 2003 |
| Chairman | 2005 – 2009 |
| Chairman | 1997 – 1999 |
| Chairman | 1996 – 1997 |
| Chairman | 2015 – 2017 |
| Board of Directors | 2007 – 2007 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1999 – 2001 |
| Chairman | 2009 – 2009 |
| Board of Directors | 1996 – 1996 |
