| Date(s): | Country: | % Correct |
|---|---|---|
| 1815 | Switzerland | 100%
|
| 1914-date | Andorra | 91%
|
| 1955-date | Austria | 91%
|
| 1939-date | Ireland | 91%
|
| 1868-date | Liechtenstein | 91%
|
| 1945-date | Monaco | 91%
|
| 1914-1918; 1939-1944; 1945-date | San Marino | 91%
|
| 1980-date | Malta | 82%
|
| 1929-date | Vatican City | 82%
|
| 1845-1939; 2014-date | Tonga | 73%
|
| 1910-date | Bhutan | 64%
|
| 2019-date | Kazakhstan | 64%
|
| 2015-date | Mongolia | 64%
|
| 1962-date | Samoa | 64%
|
| 1965 | Singapore | 64%
|
| 1949-date | Costa Rica | 55%
|
| 1994-date | Moldova | 55%
|
| 1990-date | Panama | 55%
|
| 1995-date | Turkmenistan | 55%
|
| 1975-date | Papua New Guinea | 45%
|
| 2007 | Serbia | 45%
|
| 2012-date | Uzbekistan | 45%
|
| 2012-date | Ghana | 36%
|
| 2017-date | Haiti | 36%
|
| 1947-date | Japan | 36%
|
| 1955-1970; 1993-date | Cambodia | 27%
|
| 1930-1942; 1945-date | Mexico | 27%
|
| 1951-date | Oman | 18%
|
| 2009-date | Rwanda | 18%
|