How many people live in World State in the book Brave New World?

In Aldous Huxley's "Brave New World," the exact population of the World State is not specified. However, it is implied to be a large, technologically advanced society where people are conditioned for specific roles. The focus is more on the societal structure and the use of technology for population control rather than on precise numbers. The World State emphasizes stability and uniformity, which suggests a carefully managed population.