Demographic Pyramid Since 1970s

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auldhickory
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Joined: Apr 11 2011
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Demographic Pyramid Since 1970s

 There is something I noticed about the demographic pyramid for late 2000s. From the oldest bracket until the 40-45 bracket, it still looks like a pyramid. However, it collapsess for the younger bands. Doing some basic math, it appears the demographic pyramid started collapsing in the early 1970s, say 1971.

Coincidence?

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