Do you really think Caucasians will ever become a minority?

50 years ago Europeans alone represented 27 % of the world population, and we can add almost as many caucasians in asia/north Africa, so roughly half the population of the globe. As I know, the eastern branch of caucasians never shrinked, only Europeans (to 17%). Europeans are further supposed to decrease to 8 % in the near future, then indeed caucasians will be only 1/3 of the world population. Blacks are supposed to increase to 27 % and east asians will remain pretty much the same