Left: distribution of all known pulsars from the ATNF pulsar catalogue (grey dots) and the LOFAR census pulsars (red circles) on the sky in equatorial coordinates. The cuts in declination and Galactic latitude made for the LOFAR census sample are shown as grey lines (Dec > 8° and | Gb | > 3°, respectively). For the full list of selection criteria see Table 1. Right: distribution of all known pulsars (grey dots) and the LOFAR census pulsars (red circles) on the period–period derivative, P−Ṗ, diagram. Pulsars with an unknown Ṗ are shown at Ṗ = 10^-21 s s^-1 in the diagram.