Evolution of A(Li) for the mass ranges indicated in the first three panels. The A(Li) uncertainties are typically ∼0.2 and 0.3 dex for the intermediate- and (sub-)solar mass pre-MS stars and ∼0.1 dex for MS stars. The medians of the non-detections in the MS are indicated with dotted lines. The bottom panel shows the mean values of the detections, with standard deviations as error bars. The solid and open symbols, triangles, and dashed lines are the same as in Fig. 5 (see Fig. B.1 for an expanded version).