\begin{table}%t4
%\centering
\par
\caption{\label{tab_bench1}Eigenvalues in units of $\eta/L^2$ of the first two eigenmodes of the benchmark dynamo.} 
\begin{tabular}{cccccc}
\hline\hline\noalign{\smallskip}
$n_{\rm max}$ & $l_{\rm max}$ & $\lam_0$~(A) & $\lam_1$~(S) \\
\hline
12 & 12 & $+$4.960 & $-$8.605 \\
16 & 16 & $+$4.235 & $-$8.110 \\
20 & 20 & {\bf $+$4.180} & $-$8.362 \\
24 & 24 & $+$4.195 & $-$6.620 \\
28 & 28 & $+$4.255 & $-$7.275 \\
32 & 32 & $+$4.275 & $-$6.015 \\
\hline
16 & 32 & $+$4.382 & $-$6.777 \\
\hline
\end{tabular}
\tablefoot{The symmetry with respect to the equator is marked~A for
antisymmetric and~S for symmetric. The eigensolution marked bold is displayed in Fig.~\ref{fig_bench1}.}
\vspace*{4mm}
\end{table}