The data collected by Google during the 7-day week period that ended yesterday reveals that Marshmallow is now below 29 percent, with Nougat getting closer to taking the lead, while Oreo still struggles to reach the 1 percent mark.
https://www.notebookcheck.net/Marshmallow-remains-most-popular-Android-version-Oreo-still-below-1-percent.277370.0.html