What is the lowest multiplication rate for Humans ?

No they don't.Below is Eurostat's chart of the rate of births & deaths in the 28 member states of the EU between 1961 and 2015. Note how both rates change; and not in proportion to one another. Therefore the proportion by which the population expands is not a constant. You will note that at the end of the chart we see the population is actually declining (it's not in reality, but that's only due to immigration).I've always found the resort to Fixed Truths about population growth rates to be the oddest of creationist arguments; since it's so obviously falsified by any empirical evidence you choose to look at. Evidence which is easy to find, easy to understand, doesn't require any 'evolutionist' assumptions and is usually common knowledge.Edited by caffeine, : typo