\begin{table}%t7
%\centering
\par
\caption{\label{rejfracspectab} Retained and rejected fraction in
  spectroscopic sample}
\par
%\centerline
 {\begin{tabular}{lccccc}
\hline \hline
      & Low-$z$ & & & High-$z$ & \\
      & $BVI$ & $BVIK$ & $BVIJK$ & $VRI$ & $VRIJK$ \\
\hline
$f_{\rm retain}^{\rm memb}$   & 0.95 & 0.89 & 0.90 & 0.90 & 0.89 \\
$f_{\rm reject}^{\rm nonmemb}$ & 0.53 & 0.73 & 0.88 & 0.44 & 0.53 \\
\hline
\end{tabular}}
\end{table}