| Board of Directors | 1972 – 1996 |
| Board of Directors | 1972 – 2011 |
| Deputy Chairman | 2005 – 2013 |
| Board of Directors | 1972 – 1996 |
| Board of Directors | 1972 – 1996 |
| Board of Directors | 1972 – 2005 |
| Chairman | 2005 – 2013 |
| Board of Directors | 2009 – 2011 |
| Board of Directors | 1972 – 1995 |
| Board of Directors | 2005 – 2013 |
| Board of Directors | 1972 – 2005 |
| Board of Directors | 1972 – 1996 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 2006 – 2011 |
| Board of Directors | 1972 – 1989 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1972 – 1996 |