Lower panel: stacked LFs of systems with different gaps in magnitude. Black open squares are systems with gap ≤0.5, red filled squares represent systems with 0.5 < Δm₁₂ ≤ 1.0, violet open circles indicate systems with 1 < Δm₁₂ ≤ 1.5, and green filled circles are systems with gap ≥1.5. The four LFs have been moved by an arbitrary offset for display purposes. Upper panel: histogram of the number of systems that are contributing to each bin. The color code is the same as in the lower panel.