Differential number counts of QSOs per unit area of sky. The dashed histograms show our complete selected sample, the solid histograms show the distribution of our visually selected golden sample. We compare with the spectroscopic sample of Palanque-Delabrouille et al. (2016, PD16), selected through QSO variability. Our number counts are significantly higher than those of PD16, especially at the highest bins of redshift.