\begin{table}%t1
\caption{\label{Tab:mathewson}Comparison of $v_{\rm max}$ [km~s$^{-1}$] (maximum velocity of 
rotation curves) and $HW20M_{\rm HI}$ [km~s$^{-1}$]
(Half of the HI profile between points where
the intensity falls to 20\% of the highest
channels in each half of the profile and corrected for relativistic effects;
Note: average only with the galaxies which have this datum available)
for spiral galaxies in Mathewson et~al. (\cite{Mathewson1992}) catalogue in barred and
non-barred cases as a function of the galaxy type.}
\small%\centering
\par
\begin{tabular}{lll}
\hline\hline
Galaxy type & Non-barred: (N), $\langle v_{\rm max}\rangle$,
$\langle HW20M_{\rm HI}\rangle$ & Barred: (N), $\langle 
v_{\rm max}\rangle $, $\langle HW20M_{\rm HI}\rangle$ \\
\noalign{\smallskip} \hline
+3 & (339), $174\pm 3$, $164\pm 5$ & (23), $182\pm 15$, $180\pm 17$ \\
+4 & (114), $155\pm 5$, $156\pm 7$ & (10), $205\pm 17$, $158\pm 20$ \\
+5 & (96), $127\pm 6$, $127\pm 9$ & (18), $132\pm 13$, $125\pm 13$ \\
+6 & (526), $150\pm 2$, $150\pm 3$ & (31), $127\pm 8$, $116\pm 6$  \\
+7 & (26), $112\pm 9$, $117\pm 13$ & (8), $77\pm 7$, $81\pm 7$ \\
+8 & (55), $91\pm 4$, $96\pm 4$ & (11), $78\pm 5$, $85\pm 5$ \\
\hline
\end{tabular}
\end{table}