Evolution of the cosmic SFR density ρ_SFR with redshift. The orange dash-dotted line traces the SFR density inferred from individual Spitzer MIPS (for z< 1.5) and Herschel detections alone. The solid purple line represents the contribution of stacked sources with significant signal (>5σ), and the dotted line is the extrapolation of the stacked SFR down to M_∗ = 3 × 10⁹ M_⊙ assuming constant sSFR and using the mass functions of Fig. 3. The green line shows the fraction of ρ_SFR in regimes where we have probed the existence of the main sequence. The lines are slightly offset in redshift for clarity. Light shaded regions in the background show the corresponding 1σ statistical errors. We compare these to the literature compilation of Madau & Dickinson (2014), shown as open triangles, with their best-fit plotted as a solid gray line.