Congratulations on taking some time off and getting a refresher course in biostatistics, not that it seems to have helped you much.
To REINFORCE my point, let me present to you numbers rather than percentage for last years match data because you do not seem to get that concept. Also, it is nothing like ARR or RRR.
Pulm/Crit:
Applicants Preferring this Specialty: * 728
Matched to this Specialty: 504 69%
Matched to Different Specialty: 16 2%
Did not Match to any Program: 208 29%
So, I CAN deduce that less people applied for pulm/crit than cardiology, because despite you example with 2 and 5 spots, the spots for pulm/crit are fixed and thus the percentage of matched candidates can give you an accurate data of the total number of applicants.
Cardiology:
Applicants Preferring this Specialty: * 1,134
Matched to this Specialty: 823 73%
Matched to Different: Specialty 13 1%
Did not Match to any Program: 298 26%.
Thus, of the the total number of people that applied for cardiology, a higher percentage matched (73%) as compared to Pulm/Crit and GI,
I shall give you GI's example, unless you are telling me GI is less competitive than cardio and pulm crit because there absolute numbers are actually lesser than pulm/crit and cardio but overall, they have a lower match percentage making them the most competitive field last year, and a few preceding years.
Gastroenterology:
Applicants Preferring this Specialty * 710
Matched to this Specialty 457 64%
Matched to Different Specialty 8 1%
Did not Match to any Program 245 35%
P.S. Btw, I did miss that class along with a few others since I was never a fan of biostatistics. I do get simple math right though.