Evolution of the IRRC for different source populations. The magenta curve (and points) is the power-law relation found for star-forming galaxies only, while the green curve (and squares) is that found when AGN are included (i.e. star-forming galaxies plus all AGN). The red curve (and triangles) is found when only HLAGN are considered. The cyan curve (and points) is found for the star-forming population of galaxies, excluding those with radio excess. See text (Sect. 4.3.3) for the definition of radio excess. Shading shows the 1σ uncertainty regions.