Rate density evolution. The figure shows the redshift evolution of the rate density from both our full sample (solid red lines) and flux-limited sample (dashed orange lines) analysis, limited to events above a minimum luminosity L_min = 10⁵⁰ erg s⁻¹. The corresponding evolutions from W15 and G16 are shown in blue and grey, respectively. The thick lines show the median of the posterior predictive distribution at each fixed redshift, while the shaded areas encompass the symmetric 90% credible interval.