Top: histogram of spectral types of five different population studies together with the full sample of this work. The population studies included are: Lupus (Ansdell et al. 2016), σ Orionis (Ansdell et al. 2017), Upper Sco (Barenfeld et al. 2016), Corona Australis (Cazzoletti et al. 2019), and Chamaeleon I (Pascucci et al. 2016). Bottom: histogram of the distances of the 252 Herbig disks as defined by Vioque et al. (2018) and the full sample used in this work. The black histogram shows the Herbig disks beyond 450 pc for which ALMA data are available. The shaded areas indicate the two different cutoffs used in this work.