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» Death rate ...   2006-03-17 10:42 Arik

Well that's a reasonable idea. How to encode it is I suppose the issue. A population distribution by age group is not just a single number(or single relationship of several numbers), ergo, you start to get into arrays or collections again.

Certainly speak up if you know of a way to estimate the number of deaths in a given population in a single year. Where the average mortality is known.

Strawmans method is 1/80th each year. If you wet your finger and hold it up in the air, then any given population with an average mortality of 80, in 80 years they will be all dead. And 1/80th each year (almost) gives you that effect. In a growing population it overstates deaths, and in a declining population it understates deaths. But is close enough for the purpose here.