What percentage of world's population is Catholic?

Ok i know there is 49.4%, is in the Americas, compared to 25% in Europe, 10.7% in Asia, 15.2% in Africa, and 0.8% in Oceania. a href="http://www.youtube.com/watch?v=ymoPg1CenZE" rel="nofollow"http://www.youtube.com/watch?v=ymoPg1Cen…/a So how many percent of the world is Catholic?