This is followed by:
"A decade later 86 percent thought it was always wrong."
This quote is from Steven Pinker's 2011 best-seller The Better Angels of our Nature. Don't let it get you down, the point of it is to show just how far we have come in so little time.
This was only 33 years ago!
It goes to show that we can change as a culture, social problems like any other are truly solvable!