\begin{table}%t3
\caption{\label{table:cfgs-sym}Distribution of configurations for each symmetry in the two versions of the calculation.}
%\centerline
 {
\begin{tabular}{c@{\quad}c@{\quad}c@{\quad}c@{\quad}c@{\quad}c}
\hline\hline\\[-5pt]
Symmetry & Calc. A$^a$ & Calc. B$^b$ & Symmetry & Calc. A$^a$ & Calc. B$^b$\\
\hline \\[-3mm]
$^1$S$^{\rm e}$ &  51 &  59 & $^1$P$^{\rm o}$ &  82 & 104 \\
$^1$P$^{\rm e}$ &  66 &  86 & $^1$D$^{\rm o}$ &  73 &  96 \\
$^1$D$^{\rm e}$ &  89 & 112 & $^3$S$^{\rm o}$ &  54 &  67 \\
$^1$F$^{\rm e}$ &  41 &  58 & $^3$P$^{\rm o}$ & 114 & 144 \\
$^3$P$^{\rm e}$ & 125 & 158 & $^3$D$^{\rm o}$ & 111 & 146 \\
$^3$D$^{\rm e}$ &  99 & 134 & $^5$S$^{\rm o}$ &  29 &  34 \\
$^3$F$^{\rm e}$ &  66 &  93 \\
$^5$P$^{\rm e}$ &  44 &  59 \\
\hline
\end{tabular}}
\smallskip
   $^a$ Calc. A: 1044 configurations, retained for remainder of the calculation. 
   $^b$ Calc. B: 1350 configurations.
\end{table}