Last time I saw numbers it was under 1100. Statistically it has been about 18% of all applicants that will receive a scholarship. @80% will get a type 7, 15% will get a type 2, and 5% get a type 1.
Note the 18% is applications, not the % for boarded. Not everyone that opens an application will complete it, or be boarded. Some will not be boarded because they do not meet the academic requirements, such as the SAT/ACT mins. Like USAFA the overall % increases if you get to boarded.
If 613 have been awarded already that would bring it to @ the 1100 number. Dec has traditionally been the big release.
Think of the scholarship release like a bell curve. The 1st and last boards typically offer the least amount. The 1st board because they don't want to hand out everything right out of the gate. The ones that get a scholarship at that board are usually the ones they know from historical data they will get a scholarship and that type of scholarship. The last board the numbers are small because not only is there a limited pot of gold and they are at getting close to no more money, but, they are also down to fewer applicants.
Good luck.