SFR_norm and L_X are the mean values of the measurements presented in Fig. 7, grouped in L_X bins of 0.5 dex, at all redshifts combined, and weighted based on the number of sources in each bin shown in Fig. 7. Errors represent the standard deviation of SFR_norm and L_X in each bin. SFR_norm is systematically lower than one (below the dashed line), which means that at these luminosities the SFR of X-ray AGN is lower compared to that of MS star forming galaxies. In the Boötes field (blue circles), X-ray sources span higher luminosities than their counterparts in COSMOS. In the latter case, SFR_norm values indicate that the SFR of AGN is at least equal to (if not higher than) that of non-AGN systems.