Perhaps it is a small number, but none of us here know that with any certainty, any guesses to it are just that, a guess, nothing more
Since we know that comic readers will buy stuff they don't really like to maintain a run number or complete a collection we can only know those buyers exist
My opinion is that with all longer established characters that proportion is actually higher than we might imagine
But as I say, none of us know that number with any accuracy
I am certainly appreciative that the war is coming to a conclusion, then I can look forward to what comes after