| Year | Host City | % Correct |
|---|---|---|
| 2015 | Paris | 94%
|
| 1995 | Berlin | 73%
|
| 2009 | Copenhagen | 48%
|
| 1996 | Geneva | 48%
|
| 2003 | Milan | 46%
|
| 2013 | Warsaw | 43%
|
| 1997 | Kyoto | 39%
|
| 2002 | New Delhi | 38%
|
| 2005 | Montreal | 36%
|
| 1998 | Buenos Aires | 35%
|
| 2014 | Lima | 29%
|
| 2000 | The Hague | 23%
|
| 2006 | Nairobi | 15%
|
| 1999 | Bonn | 14%
|
| 2018 | Katowice | 14%
|
| 2012 | Doha | 13%
|
| 2010 | Cancún | 9%
|
| 2011 | Durban | 9%
|
| 2008 | Poznań | 9%
|
| 2007 | Bali | 8%
|
| 2001 | Marrakech | 8%
|