@Matthew9Thirtyfive your response might be Navy specific.
Below is the annual Army Medical Education Update powerpoint. It gives a nice overview of the HPSP as well as max/min/average board scores for those who have matched into the various specialties of Army medicine. There are a whole bunch of other useful bits in here as well - enjoy!
sites.google.com
For Army, IM usually does not initially fill though it could be intentional to meet the upcoming needs of service, rather than train too many. Take a look at the annual Army GME documents.... below is a quote from a recent GME document. You can also see this in the ACGME Accreditation Data System.
"• Rebuttal board (Scramble) for unfilled positions:
− 2015: Dermatology; Internal Med; Ob/Gyn; Pathology; Radiology
− 2016: Family Med; Internal Med; Psychiatry
− 2017: Anesthesia; Family Med; Internal Med; Pathology; Urology
− 2018: Family Med; Internal Med
− 2019: Family Med, Internal Med"