OAT haven't a clue (by their own admission) what their success rate is in gaining grads employment. That looks like it has changed with the APP, as they now seem to be keeping closer tabs on what people are up to, and hopefully establishing some kind of longer-term contact with their alumni as contacts in this business are everything.
However, many of the 'job successes' are from grads who left long before the APP was launched, and only lists those who have bothered to let OAT know what happened to them. I know there are a great many ex studes who will not do anything to help out OAT as they are very bitter about the lack of assistance from the school post graduation, or the failure to pass on information relating to selection panels that have been sitting for a variety of airlines in order to keep it 'in house' for the exclusive benefit of APP grads.
If you really wish to know, then consider what the annual output is of students (1 integrated course of up to 20 every 4 weeks, plus modular, plus all the overseas courses), take account of the poor recruitment market over the last 3 years, and then look at the job successes for last year, which was just about the only year where recruitment had picked up to anywhere near 3 figures.