SFEs of the primary models. The ratio of the total sink particle mass over the total mass is plotted against time in t_ff as the solid line. The red dashed line portrays the total accreted mass in relationship to the total mass. In the frames from left to right, the initial magnetic field strength increases from 0, 38, to 135 μG. The total number of sink particles formed during the run is given in the upper right corner of each panel.