Fraction of dust particles within the disc and outflow over time with respect to its reservoir. Top: time evolution of the fraction of dust particles within the disc with respect to the total number of particles used in the simulation. Bottom: time evolution of the fraction of dust particles entrained in the outflow with respect to those present in the disc just before the outflow is launched. Time t = 0 indicates the beginning of transition of the first hydrostatic core into a rotationally supported disc formed during the collapse of a 1 M_⊙ pre-stellar core. The vertical dashed magenta line marks the launch of the outflow.