in other words, onlu one country ratified it by a vote of the people. My guess is that the nation that voted for it was Luxembourg. Or maybe Andorra.
Actually the only nation who passed a referendum was Spain. I believe they had really low turnout, and it barely squeeked by. All in all its had 11 votes now. 9 by parliaments or heads of state, and 2 by the people. The people's record is 1-1.
Spain