\begin{table}%t12
\caption{\label{tab5}Irregularity fraction.}
\par
%\centering
\par
\begin{tabular}{lccccc}
\hline \hline \noalign{\smallskip}
& ${\rm frac}_{\sigma_{\rm PA}}$ & ${\rm frac}_{\Delta \phi}$ & ${\rm frac}_{k_{3,5}/k_{1}}$ & ${\rm frac}_{\rm any}$& ${\rm frac}_{\rm all}$	\\
& $(1)$ & $(2)$ & $(3)$ & $(4)$& $(5)$	\\
\hline
field \& cluster & 11 $\pm$ 5$\%$ & 68 $\pm$ 7$\%$ & 32 $\pm$ 7$\%$ & 80 $\pm$ 6$\%$ & 4 $\pm$ 3$\%$\\
only field & 10 $\pm$ 6$\%$ & 65 $\pm$ 9$\%$ & 32 $\pm$ 9$\%$  & 76 $\pm$ 8$\%$ & 3 $\pm$ 3$\%$ \\
only cluster & 13 $\pm$ 8$\%$ & 73 $\pm$ 11$\%$ & 31 $\pm$ 12$\%$  & 88 $\pm$ 8$\%$ & 6 $\pm$ 6$\%$ \\
\hline
\end{tabular}
\tablefoot {Column (1): fraction of irregular velocity fields according to $\sigma_{\rm PA}$ criterion; Col.~(2): fraction of irregular velocity fields according to $\Delta \phi$~criterion; Col.~(3): fraction of irregular velocity fields according to $k_{3,5}/k_{1}$~criterion; Col.~(4): fraction of irregular velocity fields according to at least one of the three criteria; Col.~(5): fraction of irregular velocity fields according to all the three criteria together. \\
Poisson errors are given for each fraction. \\ 
$k_{3,5}/k_{1}$ of galaxy~1F5, $\Delta \phi$ of the galaxies that have $\epsilon \leq 0.1$ (1F2, 2F4, 2F12 and~4C3) and all parameters for 1F10, 2F5, 2F11 and 2F15\&16 have been excluded from the calculations as explained in Paper~III for the MS~0451 sample and here, in Sect.~\ref{special} for the~rest.}
\end{table}