M_gas as a function of redshift for different M_⋆. The dots represent M_gas estimates from this work using the ${\delta }_{\mathrm{GDR}}-\mathrm{MRZ}$ method. the crosses represent M_gas estimates from this work following the method from Scoville et al. (2016). The squares are measurements from Saintonge et al. (2017). The bins that have been corrected for the H-dropout contribution are circled. The thick and thin solid colour lines represent the best-fit from this work, using Eq. (21) and Eq. (20), respectively. The dashed lines are the fits extrapolation. The shaded area the 68% uncertainty of the fit.