| Board of Directors | 2008 – 2017 |
| Board of Directors | 1990 – 1990 |
| Board of Directors | 2000 – 2003 |
| Board of Directors | 1990 – 2000 |
| Chairman | 2010 – 2011 |
| Board of Directors | 2011 – 2013 |
| Board of Directors | 2003 – 2003 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 2003 – 2008 |
| Board of Directors | 1990 – 1991 |
| Board of Directors | 2016 – 2017 |
| Board of Directors | 2003 – 2008 |
| Board of Directors | 1990 – 1991 |
| Chairman | 2016 – 2017 |
| Board of Directors | 1997 – 2000 |
| Board of Directors | 1990 – 2000 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2000 – 2003 |
| Board of Directors | 1995 – 1997 |
| Board of Directors | 1997 – 1997 |
| Board of Directors | 1997 – 1997 |
| Chairman | 1990 – 1990 |
| Chairman | 2011 – 2016 |
| Chairman | 2003 – 2005 |
| Board of Directors | 1990 – 1990 |
| Chairman | 2005 – 2010 |
| Board of Directors | 1990 – 1991 |