Distribution of the visual extinction, A_v, for the stars from the three populations, old (in blue), young (in green), and very young (in red). The inset shows the normalized cumulative fraction. The Kolmogorov-Smirnov test indicates that the A_v distribution of the old and intermediate-young populations are extracted from the same parental distribution with more than 5σ significance. The very young population shows signs of a slightly higher A_v distribution but is affected by low number statistics.