We had gone over the population pyramids and what they mean. If the number are at the bottom and in the middle then the population will grow and if the numbers are at the top then then the population will decrease because all the people have already passed through the age when people have children.
If the 1950's its right after World War 2 so a baby boom is in effect. Then people are having 5 or 6 children and as the years go on people are waiting longer to have kids women are having children after the age of 24 and even later so then the number of children they have have gone down. And ow that women are having children later and they are not having as many they population will indeed decrease.
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