In the week from Sept 17 to 24 the major bots have the following votes :-
minnowsupport - 5638
minnowbooster - 4120
randowhale - 2735
booster - 1560
bellyrub - 1321
That's a total of 15374 votes and they would almost entirely manifest in your statistic of whales voting for minnows or plankton at low percentages.
RE: Steemit Power Relationships between Groups