Systematic differences in the inferred counts for the 80% Smail et al. (1998) sample (solid lines) for different assumed median redshifts for the sources. The line thickness increases in the order ﹩z_{s}=1﹩, 2, 3, and 4. We also show the corresponding result for the 50% sample (dashed lines). The count values are normalized to the mean count derived from all four redshift values. These is little variation in the counts. At worst the counts for ﹩z_{s}=1﹩ and ﹩z_{s}=4﹩ differ by 30%. The mean scatter of the results about the mean for the four different redshifts between flux densities of 0.5 and 8 mJy is 12% in both the 50% and 80% samples. Note for comparison that the Poisson error on the counts is about 35%.