Comparison between the observed number counts and the models at 250 μm (left), 350 μm (middle), and 500 μm (right), for various redshift selections: all redshifts (top), 0 < z < 0.5, 0.5 < z < 1, 1 < z < 2, and z > 2 (bottom). Squares: points from stacking in GOODS-N. Triangles: points from stacking in COSMOS. Diamonds: points measured from source extraction with priors. We have overplotted the models from Béthermin et al. (2011) in red, Valiante et al. (2009) in green, Le Borgne et al. (2009) in violet, Gruppioni et al. (2011) in orange, Rahmati & van der Werf (2011) in light blue and Marsden et al. (2011) in dark blue.