Spatial density of RSQs with M₁₄₅₀ <  −22 as a function of redshift compared to the space density of faint quasar samples (M₁₄₅₀ <  −22) from the literature. The spatial density of RSQs is indicated by purple circles, while estimates from the literature (Bongiorno et al. 2007; Siana et al. 2008; Glikman et al. 2011; Masters et al. 2012; Akiyama et al. 2018; Yang et al. 2018; McGreer et al. 2018) are represented by the corresponding symbols in the legend box. We also plot the spatial density of RSQs scaled by a factor of 5.0 (1/0.20) (blue circles).