Total number of sources (solid lines) and number of sources with identifications (dotted lines) as a function of 150-MHz flux density, in bins of 0.23 dex, for all sources (blue) and via the two major methods: LGZ (green) and LR (orange). The respective fractions of identifications (i.e. the ratio of the number of sources with identifications in each category to the number of sources in each category) as a function of flux density are shown in the bottom panel. Filled regions show the errors that are estimated using Monte Carlo simulations drawn from Poissonian distributions.