Top panel: flux density distribution for our extended sample (solid black line), the Simpson et al. (2014) ALESS sample (blue dashed line), and the Danielson et al. (2017) ALESS sample (orange dot dashed line). The top x-axis, noting S_{870 μm} for the ALESS samples, has been scaled from S_{1.25 mm} by a factor of 2.8 corresponding to the ratio of continuum emission observed at 870 μm versus 1.25 mm coming from a modified black body with emissivity β = 1.5 at z ~ 2.4. Bottom panel: same as the top panel, but the samples have been normalized to their peaks to compare relative sample sizes.