Temporal evolution of star-formation rate (SFR) predicted by the NSD models listed in Table 1. Upper panel: SFR normalised to its maximum value and compared with the recent results of Sanders et al. (2024). Lower panel: SFR in physical units of M_⊙ yr⁻¹. The magenta point indicates the Henshaw et al. (2023) estimate of 0.1 M_⊙ yr⁻¹. In both panels, the grey shaded region marks the epoch preceding the formation of the Galactic bar.