Evolution of the obscured star formation density as a function of redshift. The black line is the result of our simulation. We show for comparison the infrared measurements of Sanders et al. (2003, diamond), Takeuchi et al. (2003, triangle), Magnelli et al. (2011, squares), Magnelli et al. (2013, circles), Gruppioni et al. (2013, stars), and Rowan-Robinson et al. (2016, circles with cross). We also plot the UV estimates corrected for dust attenuation from Wyder et al. (2005, asterisk), Schiminovich et al. (2005, downward-facing triangles), Robotham & Driver (2011, right-facing triangle), Cucciati et al. (2012, left-facing triangle), Dahlen et al. (2007, hourglass), Reddy & Steidel (2009, hat), and Bouwens et al. (2012a,b, bowtie). All the data have been converted to Chabrier (2003) IMF and Planck Collaboration XIII (2016) cosmology.