Typical numbers
Army - 300 (has been as high as 350)
Navy - 225 + HSCP 25
Air Force - 200
Much depends on funding. Depending on how many people are in the program, how many have had delays and fallen into new (and unplanned) fiscal years, how much money is available to pay the bonus. They will have to lower the number of scholarships to meet the funding level. Part of HPSP money comes from reserve funds and the medical side has no (or very very little) control over this pot. It is usually the limiting reagent.