I don't think there's anything concrete as far as numbers go, but we do have an Israeli news source giving a few interesting tidbits (emphases mine):

As the pilots struggled to differentiate between terrorists and civilians, the decision was made to prioritize the immediate halt of the influx of Hamas terrorists and the potentially dangerous Gaza mobs breaching the border.

What would they be prioritizing this over? Presumably, making sure the person they're targeting is a combatant before firing.

The initial pace of the strikes against the thousands of infiltrators was staggering, with the pilots eventually slowing down their attacks and meticulously selecting targets.

This implies a haphazard, "kill anything that moves" approach was employed at first.

Hamas terrorists deliberately played a cunning game with the helicopter pilots and special forces operatives. briefings revealed that the terrorists were advised to advance cautiously into the settlements and military outposts, to walk and not run, in order to appear like they were Israeli. This deception tactic persisted for some time until the Apache pilots realized that all constraints should be disregarded.

Constraints in this case would likely be silly little things like making sure your target isn't a civilian before shooting.