Here is our first table representing the distribution of the enneagram types from 19217 results, which displays an idea of the distribution within the population.

Note that type 4 is potentially the type that tends to be most naturally interested in introspection. 4s would therefore be more likely to take this kind of test. So, their population might be slightly fewer in terms of percentage on a real scale.

We can observe that the types are distributed in a fairly balanced way within the population, apart from 2s, which are a little less common, and 5s and 8s which are a little rarer.