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Posted By: Eric Brehm

The 31,652 number comes from the PSA population report for 1987 Topps. There are a total of 10,748 PSA 9's and 3,081 PSA 10's graded. More than half of the graded cards consist of Barry Bonds rookies (10,499), and Mark McGwire rookies (8,511). A few other star and rookie cards constitute the bulk of the remaining graded cards, each with populations in the hundreds. Many of the common cards have a graded population of only 1, but every card appears to have been graded at least once.