Cosmic evolution of the kinetic luminosity density. Upper panel: kinetic luminosity density derived using the Willott et al. (1999) conversion between radio and kinetic luminosity for the PLE continuous and redshift binned model of HLAGN is shown by a magenta line and circles, respectively, with the corresponding 1σ uncertainties. The KLD estimate for the starburst mode of accretion based on the semi-analytic GALFORM model as calculated by Griffin et al. (in prep.) is shown by a blue dashed line. Lower panel: KLD for the PLE continuous and redshift binned models of the full sample (gray line and circles, respectively), with corresponding 1σ uncertainties. The black solid line shows the prediction of the semi-analytical model for the radio mode of BH accretion by Croton et al. (2016). Estimates of the KLD based on the GALFORM model for the starburst and hot-halo modes of accretion and their sum are shown with blue, red and black dashed lines, respectively.