Ratio of the normalized number of halo stars selected by kinematics (N_kin = N_{bin, kin}∕N_{tot, kin}, left panels) and by metallicity (N_met = N_{bin, met}∕N_{tot, met}, right panels)to that of halo stars selected by dynamics (N_dyn = N_{bin, dyn}∕N_{tot, dyn}) in bins of thev_R − v_ϕ (top panel) and v_R − v_z (bottom panel) velocity subspaces. Bins are coloured by the logarithm of the number counts ratio.