Number density of UV (Bouwens et al. 2015) and our radio SF galaxies as a function of SFR in the two highest redshift bins. Dust-corrected (uncorrected) UV data are shown with dark (light) green open circles, and our radio data are shown with filled black circles. A fit with the functional form given in Eq. (7) is performed on the UV data only (green full line) and the radio plus faint UV data (blue full line). Dashed lines show the SFRD contribution with the scale given on the right axis. See text for details.