Answer from the abstract of the paper Kat linked in a parallel comment:
Most (73%) of the worldwide hunter-gatherer societies derived >50% (> or =56-65% of energy) of their subsistence from animal foods, whereas only 14% of these societies derived >50% (> or =56-65% of energy) of their subsistence from gathered plant foods.
Answer from the abstract of the paper Kat linked in a parallel comment: