| Board of Directors | 2010 – 2012 |
| Board of Directors | 2001 – 2007 |
| Chairman | 1980 – 2001 |
| Chairman | 2001 – 2012 |
| Board of Directors | 2001 – 2010 |
| Board of Directors | 1980 – 1998 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 2001 – 2012 |
| Board of Directors | 1980 – 1995 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 1980 – 2001 |
| Deputy Chairman | 1980 – 1990 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 2008 – 2011 |
| Board of Directors | 2001 – 2007 |
| Board of Directors | 2001 – 2012 |
| Deputy Chairman | 1980 – 1989 |
| Board of Directors | 2012 – 2012 |
| Board of Directors | 1980 – 1999 |