Dear candidate.
As far as I know you mean to know about FMGE(FOREIGN MEDICAL GRADUATE EXAM).
this is also knows as MCI screening test which is conducted by national board of examination.
It is conducted twice every year i.e June and December and it is computer based exam.
The following countries have highest percentage for this exam and it shows the following:
Bangladesh,phillipenes,Nepal,Ukraine, Russia,China, Kyrgyzstan, Kazakhstan.
Hope this information will help you.
Regards.