What per cent of the world's population live in nature's harm's way?

I saw the number once in a report and have forgotton it, need some help. Nature Harm's way was living near or on a volcano, fault line, or low lying coastal areas suspectable to typhon or huricane flooding.What per cent of the world's population live in nature's harm's way?
100% of the population can be harmed by natural phenomenon, because there is not a place on earth that isn't prone to some kind of potentially dangerous occurrence.What per cent of the world's population live in nature's harm's way?
100%