SFH of the MW disc and its sub-populations. The black curve represents the stellar mass formed per unit time as a function of lookback time, normalised by the time bin width. Left: breakdown of the SFR into high- and low-α populations, in red and blue, respectively. Middle: SFRs of the present-day kinematically defined inner (R_peri < 5.3 kpc, red) and outer (R_peri > 5.3 kpc, violet) discs. Right: SFRs of populations formed inside and outside of 9 kpc, in red and blue, respectively. In each panel, the shaded areas show the 16–84% confidence of a given SFH.