a) The magnitude of the c₁ term of the Fourier decomposition of the velocity field of NGC 1068 described in Sect. 6.1 as a function of radius (black curve). The c₁ term represents the best fit of the (projected) axisymmetric circular component of the velocity field (v_circ). We also plot the radial variation of the overall magnitude of the (projected) non-circular motions (v_nonc) derived from the Fourier decomposition till third order (red curve). b). The variation of the v_nonc/v_circ ratio as function of radius. c) The variation of the s₁/c₁ ratio as function of radius. The s₁ term represents the best fit of the (projected) axisymmetric radial component of the velocity field.