| Year of Introduction | Countries | % Correct |
|---|---|---|
| 1929 | United Kingdom | 97%
|
| 1928 | United States | 97%
|
| 1931 | Canada | 92%
|
| 1931 | France | 92%
|
| 1939* | Italy | 90%
|
| 1929* | Germany | 87%
|
| 1939 | Japan | 87%
|
| 1929 | Australia | 79%
|
| 1931* | Russia | 79%
|
| 1948 | Brazil | 77%
|
| 1946 | Mexico | 77%
|
| 1929 | Netherlands | 74%
|
| 1937* | Poland | 74%
|
| 1939 | Chile | 51%
|
| 1938 | Turkey | 44%
|
| 1948* | Czech Republic | 38%
|
| 1939 | Peru | 33%
|
| 1931 | Thailand | 15%
|
| 1946 | Philippines | 8%
|