I want to know the answer to the following question:
How many books out of 33, from 1975 to 1984, rejected race?
All the background I'm provided with is that "Since 1932, an increasing number of college textbooks introducing physical anthropology have rejected race as a valid concept: from 1932 to 1976, only seven out of thirty-two rejected race; from 1975 to 1984, thirteen out of thirty-three rejected race; from 1985 to 1993, thirteen out of nineteen rejected race.". Is that enough to answer the question?