Number of stars with MG < 5.0, as derived from the BaSTI-IAC stellar evolution library. Bottom left: age–metallicity distribution of alive stars within 100 pc of the Sun. Upper left: number of stars as a function of their age. Lower right panel: MDF_S. Upper right: fraction of stars as a function of age. Two lines indicate the 50th and 90th percentiles. In the two lower panels, the red line indicates solar metallicity [M/H] = 0. The numbers are calculated for stars with M_G < 4.2. The data represented in this figure are available at the CDS.