\begin{table}%t1
\caption{Sample statistics for various redshift ranges -- (1) the
  whole sample, (2) the sources for which the LWS aperture subtends
  $\protect\ga$$10$~kpc, (3) also excluding the two high-redshift quasars
  \citep{mcc+05,iye+06} and finally, (4) the sources for which the
  aperture subtends $\protect\la$$10$~kpc.}
\label{stats}
%\centering
\par
\begin{tabular}{l c c c} 
\hline\hline
%\noalign{\smallskip}
Redshift range & $n$ & $P(\tau)$ & $S(\tau)$\\
%\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{$L_{\rm [CII]}/L_{\rm FIR}$-Luminosity distance (Fig.~\ref{ratio-lbt})}\\
\noalign{\smallskip}
%\hline
\noalign{\smallskip}
Whole & 108 &0.0090 & $2.61\sigma$ \\
$z>0.006$ & 63 &0.0022 &  $3.06\sigma$ \\
$0.006\leq z\leq0.1296$ & 61 & 0.0114  & $2.53\sigma$ \\
$0<z\leq0.006$ & 45 & 0.1589 & $1.41\sigma$ \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{$L_{\rm [CII]}-L_{\rm FIR}$ (Fig.~\ref{cii-fir})}\\
\noalign{\smallskip}
%\hline
\noalign{\smallskip}
Whole & 110 & $5.9\times10^{-30}$ & $11.4\sigma$ \\
$z>0.006$ & 63 &$1.1\times10^{-14}$ &  $7.73\sigma$ \\
$0.006<z\leq0.1296$ & 61 & $1.8\times10^{-13}$ & $7.36\sigma$ \\
$0<z\leq0.006$ & 45 & $5.2\times10^{-13}$ & $7.22\sigma$ \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{$L_{\rm [CII]}$--Luminosity distance (Fig.~\ref{cii-fir-lbt})}\\
\noalign{\smallskip}
%\hline
\noalign{\smallskip}
Whole & 108 & $1.1\times10^{-19}$ & $9.08\sigma$ \\
$z>0.006$ & 63 &$4.1\times10^{-10}$ &  $6.25\sigma$ \\
$0.006<z\leq0.1296$ & 61 & $6.6\times10^{-9}$ & $5.80\sigma$ \\
$0<z\leq0.006$ & 45 & 0.0060 & $2.75\sigma$ \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{$L_{\rm FIR}$--Luminosity distance (Fig.~\ref{cii-fir-lbt})}\\
\noalign{\smallskip}
%\hline
Whole & 108 & $2.3\times10^{-19}$ & $9.00\sigma$ \\
$z>0.006$ & 63 &$8.1\times10^{-13}$ & $7.16\sigma$ \\
$0.006<z\leq0.1296$ & 61 & $1.6\times10^{-11}$ & $6.74\sigma$ \\
$0<z\leq0.006$ & 45 & 0.1152 & $1.58\sigma$ \\
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}