| Board of Directors | 2003 – 2011 |
| Chairman | 1979 – 1995 |
| Board of Directors | 2016 – 2018 |
| Board of Directors | 1979 – 1996 |
| Board of Directors | 1979 – 1989 |
| Board of Directors | 2005 – 2007 |
| Deputy Chairman | 2013 – 2016 |
| Board of Directors | 1979 – 1989 |
| Chairman | 1979 – 2018 |
| Board of Directors | 1979 – 1993 |
| Board of Directors | 1979 – 1999 |
| Board of Directors | 2015 – 2018 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 1979 – 1993 |
| Board of Directors | 2003 – 2013 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2004 – 2005 |
| Board of Directors | 2013 – 2015 |
| Board of Directors | 2018 – 2018 |
| Chairman | 1979 – 2003 |
| Deputy Chairman | 2003 – 2004 |
| Board of Directors | 1979 – 1991 |
| Board of Directors | 1979 – 1999 |
| Deputy Chairman | 1996 – 1999 |
| Board of Directors | 1979 – 1991 |
| Board of Directors | 1979 – 1995 |
| Board of Directors | 1979 – 1992 |
| Board of Directors | 2003 – 2011 |