Top: Mean mass fraction for the galaxy sample computed in bins of 0.5 Gyr. Bottom: Mean cumulative mass fraction of the galaxy sample. In both panels, the colours indicate different stellar mass bins. Thick lines indicate the mean values and the surrounding shaded area the 1σ dispersion of the distributions. We have 135 low-mass galaxies, 140 intermediate-mass, and 118 high-mass systems. Horizontal and vertical grey-dashed lines indicate the half-mass-and-cumulative fraction and half-age of the Universe, respectively.