| Chairman | 2013 – 2017 |
| Chairman | 2004 – 2012 |
| Board of Directors | 2004 – 2017 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 2004 – 2011 |
| Board of Directors | 1990 – 1996 |
| Board of Directors | 1990 – 1993 |
| Chairman | 1997 – 2004 |
| Board of Directors | 1990 – 1992 |
| Board of Directors | 2004 – 2016 |
| Board of Directors | 1990 – 1997 |
| Board of Directors | 2012 – 2016 |
| Board of Directors | 1990 – 1992 |
| Board of Directors | 2012 – 2016 |
| Board of Directors | 2013 – 2017 |