The actual # of folks applying to pathology is not exactly known. All that is known is the # of spots offered this year through the Match and how many of those spots were filled.
This year 526 were offered and there were only 45 unfilled positions. That comes out to approximately a 92% fill rate. I have no clue how this percentage stacks up to previous years.
Clearly, what we need to know to look into the competitiveness of this field is to know the # of folks who applied this year. We already know that 481 people secured a PGY-1 pathology position via the Match. Thus, there are only two unknown values remaining (total # applicants & # unmatched folks). But to my knowledge, I don't know what either of these numbers are.