Electron density profiles of the targets presented in this paper. Blue data points show the electron density values obtained from the maps in Figs. 6 and 7, while the solid red line shows the exponential fit to the profile (see text for details). The exponential index is given in Table 2. For the targets with ionized outflows, i.e. NGC 1068, NGC 1266, and NGC 2110 (bottom panels), the density profiles were obtained for the maps presented in Fig. 8.