+----+---------+
| c  | country |
+----+---------+
| 15 | ru      |
| 14 | pl      |
| 14 | us      |
| 10 | ca      |
|  6 | de      |
|  5 | ua      |
|  5 | se      |
|  3 | hu      |
|  2 | es      |
|  2 | cl      |
|  2 | bo      |
|  2 | no      |
|  2 | pe      |
|  2 | lt      |
|  1 | ro      |
|  1 | at      |
|  1 | kz      |
|  1 | fr      |
|  1 | mx      |
|  1 | nl      |
|  1 | uk      |
|  1 | hr      |
|  1 | br      |
|  1 | it      |
|  1 | fi      |
|  1 | au      |
|  1 | gr      |
|  1 | by      |
|  1 | bg      |
|  1 | cn      |
+----+---------+
30 rows in set (0.01 sec)