| Double Letter | Country | % Correct |
|---|---|---|
| CC | Morocco | 77%
|
| SS | Russia | 75%
|
| PP | Philippines | 68%
|
| OO | Cameroon | 67%
|
| EE | Greece | 66%
|
| RR | Andorra | 56%
|
| LL | Seychelles | 53%
|
| LL | Marshall Islands | 51%
|
| TT | Saint Kitts and Nevis | 48%
|
| RR | Sierra Leone | 44%
|
| SS | Guinea-Bissau | 41%
|