To date, there are 837 replies spanning 42 pages on this "black coupe pictures" thread. Including mine.
https://forums.pelicanparts.com/porsche-911-technical-forum/188220-black-911-coupes-some-proud-pictures.html
IMHO, black was an extremely common color for the 1980's 911 cars, and the popularity of that color continued to today.
A bit of research may be able to determine the number of 911 units sold by year and by color. Perhaps one of the many knowledgeable visitors to this site already has that information available.