| Board of Directors | 1980 – 1988 |
| Board of Directors | 1980 – 1994 |
| Deputy Chairman | 1980 – 1988 |
| Board of Directors | 2013 – 2015 |
| Deputy Chairman | 1980 – 1990 |
| Board of Directors | 1997 – 2010 |
| Board of Directors | 2012 – 2015 |
| Board of Directors | 1980 – 2008 |
| Board of Directors | 1980 – 1988 |
| Chairman | 1980 – 1990 |
| Board of Directors | 1980 – 1990 |
| Board of Directors | 1980 – 1990 |
| Chairman | 2012 – 2015 |
| Chairman | 1980 – 1988 |
| Board of Directors | 1980 – 1991 |
| Board of Directors | 2008 – 2012 |
| Board of Directors | 2012 – 2013 |