Figure 10: SZ source counts with observational constraints, as a function of SZ flux density expressed at 400 GHz. The two hatched boxes show the 95% one-sided confidence limits from the VLA and the RT; due to the uncertain redshift of the clusters, there is a range of possible total SZ flux density, which has for a minimum the value observed in each beam and a maximum chosen here to correspond to . From the SuZIE blank fields, one can deduce the 95% upper limit shown as the triangle pointing downwards (Church et al. [18]). We also plot the predictions of our fiducial open model () for all clusters (dashed line) and for those clusters with .