Non pilot speaking, nor am I a statistician or mathematician but ... any number about anything that improves by that percentage of such a short time scale, has to be suspect! If a company improved their profits by such an amount, then I would not believe it either.
Whilst I am prepared to believe that things are better than they were, I am also of the view that the airline biz continues to take too much for granted. They rattle off the 'Safety is our number one concern' but I don't believe all of them (some, not all). It is surveys like this that promote the idea that we are moving steadily into a better world. That is the usually the moment of the greatest danger.