The 'Most Olympic medals per letter of the alphabet' quiz

Can you name the country with the most Olympic medals per letter of the alphabet? No country exists that begins with an X. The only country that begins with an O, Oman, has never won a medal. And some of these countries no longer exist as they are, but for the purposes of this quiz, they stand and the first letter will correspond. Quiz clue: Letter / Medal count. Good luck!