Li abundances vs. [Fe/H] for the microlensed dwarf sample for stars older than 8 Gyr (upper plot) and for stars younger than 8 Gyr (lower plot). The stars are colour coded based on their effective temperatures (according to the colour bar on the right-hand side). Triangles represent those stars for which we could only determine upper limits on the abundances. The sizes of the circles and triangles are scaled by the ages of the stars, as shown in the lower left corners of the plots. The coloured plus signs in the background of each plot represent the stars from the sample of 714 stars from Bensby et al. (2014) that are older and younger than 8 Gyr, respectively. The red and blue solid lines and the red and blue shaded regions show the running mean Li abundance and the dispersion around the mean, calculated from the (up to) six stars with the highest Li abundances that have T_eff >  5800 K, in steps of 0.15 dex and with a bin size of 0.2 dex for the nearby disk stars. The dotted lines show the solar values with the solar photospheric Li abundance taken from Asplund et al. (2009).