That is the most stupid remark ever. He's saying that accidents (which would lead to increased injury and death) went UP after seat belts were introduced. Given the sheer stupidity of that claim, nothing else he says should be believed.
But a visual correlation doesn't prove causality. Perhaps your chart is, like this one, is measuring the aggregate and continuous enhancement in product safety, driver learning, better road markers, and other things like air bags as well as seat belts.
Thank you for your post. It counters the Agendanistas who never seem to tire of producing their falsehoods.