He was going through some of his father's papers and found his classification notice. Because of a novel project I've written a synopsis for, I recently learned that absolutely no one was drafted from birth year 1954 on. Krugman was born in 1953. His number was 295, so he was safe anyway. But I was sort of interested to note that (a) he apparently never knew his own number and (b) he doesn't give any indication that he is aware that his birth year was the _last_ birth year anyone was drafted from.
The transition to the end of the draft is easily one of the least marked and remarked upon transitions in the middle of the 20th century, possibly because it occurred in such slow stages, that it was only in retrospect that any end "point" could be determined, and even then, the "correct" "point" to choose was entirely ambiguous (do you pick the last birth year? do you pick the last calendar year anyone was drafted? do you pick some later year, based on any number of further legal changes that moved us from having a draft but never using it to not having a draft?).
ETA: Also, we should all send him a birthday card next Feb 28.