I don't think they publish those types of numbers. Plus, I would assume that the rate varies school by school, so even if they released a national number it maybe higher or lower at your DSs school. Plus, in the past years SFT numbers have varied greatly, so it is possible that the class of 14 graduated at a much higher rate than 16 will because 14 had a 90%+ rate for the training and 16 had a rate of barely over 50%. Scholarships are not placed into the equation for selection.
The big drops for scholarship recipients impo occurs after the freshman year because that is when they can leave...no harm no foul. The next big drop is AS200 because of the SFT requirement. Some units will do what is called a mini board. This is where in the fall they sit down with every cadet and inform them of where they stand from their perspective and may say at this time with their stats they would be unlikely to be picked up if the rate from the previous year remains the same. Many times that is when the non scholarship cadet will walk, but the scholarship cadets will ride it out.