Intrinsic (i.e. AGN-corrected) q_IR evolution as a function of redshift (x-axis) and M_⋆ (colour bar). The L_IR estimates are the same reported in Fig. 8, while L_1.4 GHz measurements have been re-calculated after excluding radio-detected AGN (Sect. 4.2). For comparison, other IRRC trends with redshift are taken from the literature (black lines): Bell (2003, dotted); Magnelli et al. (2015, dashed); Delhaize et al. (2017, dot-dashed) and their AGN-corrected version after removing 2σ outliers (triple dot-dashed lines).