I've put some code on github for visualizing a population pyramids as an animation.
There is an example animation of the Faroese population on Vimeo.
By looking at the animation, we can see that the population suddenly in the first part of the ninties
declines drastically. This is due what is known on the Faroes as kreppan, the crisis.
The crises was from 1989 to 1994, see wikipedia.
The data is a little old, as the code is from the first part of 2012, so it only goes to 2011 for now.
Maybe it will get update sometime. It would be interesting to do some forecasting too using
some kind of statistical model.
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