@Ernest: That would be cool and very informative to look at A) stylistic changes over time B) the moment that DI took over the grading world.
@Daniel: I note that there are spikes in all the Primaries and Secondaries, so perhaps it may not be the ratings screens... perhaps simply an interesting anomaly based on the digital application of color which can push and pull the 3 color channels (pure primaries -- blended to make pure secondaries) directly.