Marginalized 1D posterior constraints for the mean photoionization rate ($⟨{\mathrm{\Gamma }}_{12}^{\mathrm{HI}}⟩$) and the effective mean free path (λ₀) at different redshifts. The constraints correspond to 95% confidence limits where the constraints are available from both sides. For the limits, we quote the value where the posterior falls down to 1/e² from the maximum. The red circles denote the constraints derived from this work (hollow circles represent the redshift where reionization is not complete). The redshifts for green and blue points have been shifted by 0.02 dex for visual clarity.