Top: change in TSI relative to the quiet Sun value, ΔTSI, smoothed over a year (blue) based on the semi-synthetic sunspot group record SGR300. The contribution of spots, faculae, and ephemeral regions are also shown on a daily basis as grey dots, black dots and the dot-dashed black curve, respectively. Bottom: comparison between the TSI reconstructions from SATIRE-T2 using SGR300 and SGR301 (both based on R_g as input (blue), and SATIRE-T (red) smoothed over 1 yr, and the yearly values of the reconstruction from Wang et al. (2005, orange). The grey bars at the bottom indicate the times when the statistical relationships of SATIRE-T2 have been extrapolated beyond the range of observations on which they are based.