Gas depletion timescale as a function of Δ_MS = SFR/SFR_MS. The red filled circles represent the mean values of the binned data as in Fig. 4. A MS border of Δ_MS = 3 is indicated by a vertical, blue dashed line. The red, dashed curve indicates the best-fit function to the binned data, . The green and magenta dashed curves show the relationships derived by Genzel et al. (2015) for the dust-based and CO plus dust-based (global) τ_dep values, respectively. The yellow dashed line shows the best-fit relation from Tacconi et al. (2017), which almost overlaps with the global Genzel et al. (2015) relation.