Actually, the number most commonly given is 2.1, not just "2". A population needs 2.1 children per woman on average because that extra 0.1 compensates for people dying before being able to have children.
Actually, the number most commonly given is 2.1, not just "2". A population needs 2.1 children per woman on average because that extra 0.1 compensates for people dying before being able to have children.
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