It would appear that the fewer students you have, the more state funding you get.
From an analysis done by The Commonwealth Foundation:
Consider that during the 2012-13 school year, state revenue per student in Pennsylvania's 20 fastest-growing districts was slightly more than $3,000. In contrast, state revenue per student among those districts with the largest decreases in enrollment was nearly $10,000. Put another way, school districts with declining enrollment received more than three times the state funding per student than growing districts.Harmed by "Hold Harmless"