Turnout was about 72%, so really it was (approx) Leave 37%, Remain 35%, Don’t Know/Care 28%.
Also worth pointing out that the hard Brexit we got, where we left Schengen and abandoned much of our cross-European programmes, was almost unthinkable, and not seriously considered by the media. Whenever it was brought up, it was decried as “project fear” by those who pushed for it.