Upper panel: log of the Ṁ_jet/Ṁ_acc  ratio plotted as a function of the log of the stellar mass. The three horizontal dashed lines correspond to Ṁ_jet/Ṁ_acc = 1, 0.1 and 0.01. Black, red and green symbols are as in Fig. 4 while blue triangles refer to the sources in Taurus (see caption of Fig. 9). Lower panel: log of the Ṁ_jet/Ṁ_acc  ratio plotted as a function of the log of the mass accretion rates.