Marginalised posterior distribution of the increase of the local Hubble rate H_LS (Eq. (9)) at the origin (due to the under-density) with respect to the Hubble rate H_bg of the homogeneous background model, δH = H_LS − H_bg. LTB models with fixed radial size L = 3 Gpc and a local matter density profile represented by cubic splines with three equidistant interpolation nodes were fitted to observational data of the local Hubble rate and supernovae. The LTB models were asymptotically embedded into an Einstein-de-Sitter background.