Departure coefficients as a function of pressure for the first 80 energy levels of FeI. The energy levels are numbered from 1 to 80, and are separated into groups of ten levels and two line styles (solid and dashed) for each panel. Within each group of ten energy levels, the order of the line colours corresponding to increasing energy is black, red, blue, dark green, magenta, yellow, brown, grey, bright green, and orange. The dotted line (at 1.0) indicating n_NLTE = n_LTE is for reference.