I'm afraid that it won't help you to have information on previous years - every year is completely different. The list might move substantially, or it may not change at all - it just depends on where qualified children live. By this stage the probability is that it will only move by 2 - 3 places. For what it's worth, you can see some previous allocation stats here:
Have you considered Beaconsfield High? They have empty places and are touting for business.