This figure is constructed identically to Fig. 4. We plot the brightest component's fraction of the total flux, as a function of the total flux, in cyan circles. In grey triangles, we plot the second brightest component's contribution to the total flux. In dark blue squares, we plot the fraction of the total flux contained in the brightest and the second brightest components combined. At the low total 250-μm flux end, the combination of the top two components accounts for approximately 90 per cent of the flux in the 250-μm source. At the high-total flux end, where we expect the brightest and second brightest components to be of nearly equal brightness, the top two sources account for approximately 70 per cent of the total flux. At intermediate total fluxes, the sum of the brightest two components is reasonably constant at 70 per cent of the total flux.