Dust-ratio PDFs for the total dust-to-gas ratio, the 0.6 nm dust grains, the 1.6 nm dust grains, the 4.5 nm dust grains, the 0.08 μm dust grains, and the 12 μm dust grains. The black, red, and blue lines show respectively the 128MRN, the 256MRN, and the 512MRN runs. The dust-ratio PDFs are normalised to the initial dust ratio of each dust species (ϵ_i/ϵ_i,0) and the PDFs of the total dust-to-gas ratio is not normalised to the initial dust ratio and thus peaks around 0.01.