Best-fit Schechter parameters for the LFs in the nine intervals of redshift. The horizontal dashed lines represent the average best-fit Schechter parameters across all redshifts. When leaving all three parameters free (green squares), the normalization Φ^* and the characteristic luminosity L^* show a slight decline within the intervals of confidence, whilst the faint-end slope α shows no clear trend. We also show the fitted parameters when fixing α and L^* to the average values marked with the green dashed lines (blue triangles). The values of the latter are slightly shifted in the horizontal axis for visual clarity.