Webb,
There are no reliable statistics on color production. Heck, even Chevy didn't always have this information for Corvettes.
There is good information regarding when specific colors started and ended production, though.
Also, keep in mind that it was not uncommon, even from the very beginning of TR2 production, for cars to be repainted by the dealers prior to sale. Since cars would spend so much time on docks and on ships heading to US dealers, paint was oftentimes oxidized and flaking off before getting to the showroom. Also, in cases of Olive Yellow and some other questionable factory colors, dealers would repaint the car red, green, blue, silver or black just to sell it.