It seems the rules might change from time to time... before I was injured the rules had been "just" so many credits... when I was injured it was "so many credits within so many years of the injury" so I have no clue what it might be now, nearly 19 years later. I think, on the back of the ss credit slip you should be receving each year, it says. Everyone is supposed to receive that accounting each year, btw. Have you googled "social security credits" ? try to be less specific and you might find the page on which the listing is... good wishes...