| Year | Answer | % Correct |
|---|---|---|
| 1975 | FW/FW04 | 100%
|
| 1976 | FW04/FW05 | 98%
|
| 1978 | FW06 | 96%
|
| 1979 | FW06/FW07 | 96%
|
| 1981 | FW07 | 96%
|
| 1982 | FW07C/FW07D/FW08 | 96%
|
| 1980 | FW07/FW07B | 96%
|
| 1983 | FW08C/FW09 | 96%
|
| 1984 | FW09/FW09B | 96%
|
| 1985 | FW10/FW10B | 96%
|
| 1986 | FW11 | 96%
|
| 1988 | FW12 | 96%
|
| 1989 | FW12C/FW13 | 96%
|
| 1991 | FW14 | 96%
|
| 1994 | FW16/FW16B | 94%
|
| 1995 | FW17/FW17B | 94%
|
| 1996 | FW18 | 94%
|
| 1997 | FW19 | 94%
|
| 1998 | FW20 | 94%
|
| 1999 | FW21 | 94%
|
| 2000 | FW22 | 94%
|
| 2001 | FW23 | 94%
|
| 2002 | FW24 | 94%
|
| 2016 | FW38 | 94%
|
| 2003 | FW25 | 92%
|
| 2004 | FW26 | 92%
|
| 2005 | FW27 | 92%
|
| 2006 | FW28 | 92%
|
| 2007 | FW29 | 92%
|
| 2008 | FW30 | 92%
|
| 2009 | FW31 | 92%
|
| 2010 | FW32 | 92%
|
| 2011 | FW33 | 92%
|
| 2012 | FW34 | 92%
|
| 2013 | FW35 | 92%
|
| 2014 | FW36 | 92%
|
| 2015 | FW37 | 92%
|
| 2017 | FW40 | 92%
|
| 2018 | FW41 | 92%
|
| 2019 | FW42 | 92%
|
| 2020 | FW43 | 92%
|
| 2022 | FW44 | 92%
|
| 2023 | FW45 | 92%
|
| 2024 | FW46 | 92%
|
| 1987 | FW11B | 90%
|
| 1990 | FW13B | 90%
|
| 1992 | FW14B | 88%
|
| 2021 | FW43B | 85%
|
| 1993 | FW15C | 75%
|