The results are be in % of total facility slots.
I calculated the proportion of every planet/size/type combination based on sector types, and in the system and quadrant files.
Here's the file if you want to check for mistakes, it took me a while to copy data from the FQM systems file and there could be some mistake there.
No there are not, there is 1 more small-methane-rock planet and 1 less small-methane-ice planet the stock sectortypes file.