Starburstiness (R_SB ≡ SFR/SFR_MS) histograms of individual Herschel and Spitzer MIPS (for z< 1.2) detections in each of our redshift and stellar mass bins. The blue and orange lines correspond to the counts in the CANDELS and COSMOS 2 deg² fields, respectively. We also show the incomplete counts in light colors in the background. The green curve shows our best-fit to the combined data set, and is the same for all bins except for the normalization, which is set by the mass function. The black vertical line shows the locus of the main sequence. Error bars indicate Poissonian noise.