Mean completeness correction for the sample of RxAGN as a function of redshift. The mean completeness (solid line), with its corresponding standard deviation (shaded interval), were estimated for different redshift bins using the 3 GHz flux densities and interpolated completeness corrections for the VLA-COSMOS 3 GHz Large Project catalog (Table 2 in Smolčić et al. 2017a). The mean completeness correction is used to quantify the completeness in the RxAGN sample, which is higher than 75% up to z ∼ 4.