Google has released data on the current market distribution of the various versions of Android. The ranking stays the same as it was last month, with Marshmallow in first, Lollipop in second, and Nougat in third. Oreo remains irrelevant, as it only just matched Ice Cream Sandwich's 0.5% distribution, a disturbingly unprogressive rise from its 0.3% figure last month.
https://www.notebookcheck.net/Android-OS-version-metrics-for-November-released-Oreo-sees-pitiable-climb-to-0-5-market-distribution.271464.0.html