Normalised star formation rate distribution for sources at z < 1.2 (blue line) and at z > 1.2 (green dashed line). The histogram has been normalised to the total number of sources. The AGNs in the lower redshift bin have SFRs comparable with galaxies on the star-forming main sequence (log SFR_norm = 0), whereas AGNs at higher redshift have enhanced SFRs compared to galaxies on the main sequence. This suggests evolution of the SFR_norm with redshift (see text for details).