So, once again, you did not read the entirety of the article you linked. You stopped at the first thing you disagree with, hunt quickly for a few more tasty bits, and paste them in your post, arguing against them all completely out of context.
And the graph, conveniently in French, shows percentages of age distribution, not the population totals changing over time. Ratios. Notice there is not a decade or year graph? The only year mentioned is the UN updated it in the year 2004. Notice the boldly highlighted representation of the percentage of the sexes? Notice that the Cambodians have a lot of kids, which is the pattern of every struggling, developing nation on Earth?
You're a moron.