Level of Descriptive Representation Unrelated to Population Size

Here’s a null result I’ve long wanted to share: The level of descriptive representation seems unrelated to population size. More specifically, the share of women in national legislatures and the share of ethnic minority groups in national legislatures (relative to their size in the population) does not correlate substantially with the overall population size. I’ve looked into this a few years back after receiving comments that the nature of political representation could be expected to be different in small countries (microstates). I’m still unsure why this would be the case — except that in really small chambers including an additional woman adds much to the share of women.