| Board of Directors | 2002 – 2015 |
| Board of Directors | 2002 – 2006 |
| Board of Directors | 1985 – 1992 |
| Board of Directors | 2010 – 2012 |
| Board of Directors | 1985 – 1993 |
| Board of Directors | 2002 – 2004 |
| Deputy Chairman | 2012 – 2015 |
| Board of Directors | 1999 – 2002 |
| Board of Directors | 1985 – 1995 |
| Deputy Chairman | 2015 – 2015 |
| Board of Directors | 1985 – 1988 |
| Board of Directors | 1985 – 1995 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 1985 – 1989 |
| Board of Directors | 1985 – 1990 |
| Board of Directors | 1985 – 1988 |
| Chairman | 2010 – 2012 |
| Board of Directors | 2008 – 2010 |
| Board of Directors | 1998 – 2003 |
| Board of Directors | 1985 – 2002 |
| Chairman | 1985 – 1994 |
| Board of Directors | 2006 – 2008 |
| Chairman | 2012 – 2015 |
| Chairman | 1985 – 1992 |
| Board of Directors | 1985 – 1995 |
| Board of Directors | 1985 – 1992 |
| Board of Directors | 1985 – 1991 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 1985 – 1999 |