Density rate evolution inferred from the non-ML GRB catalog for the best-fit luminosity evolution parameter k and the two values corresponding to the 1σ EP range, overlaid on the observed cosmic SFR density. Across the allowed range of k, the inferred density rate evolution shows the same low-redshift enhancement relative to the SFR. At high redshift, the curves exhibit only small fluctuations and retain the same overall declining behavior.