We used this number along with the % of Christians who believe in Bible Literalism (30%) to figure out what population of Americans believe in Bible Literalism. Your comment is completely irrelevant.
Oh right...i thought creationist counted as literalist. My bad. But now that you mentionned the irrelevance of my comment, I realize that 40% of american believing that god created the earth 6000 years ago has nothing to do with Bible Literalism... Wait what?