\begin{table}%t5
\caption{\label{tab5}The source breakdown for the \xr~sample, the {\it Red} sample, and the total sample. See Sect. 5.2 for details.}
%\centerline
{
\begin{tabular}{lccc}
\hline\hline
\multicolumn{1}{l} {Source}&
\multicolumn{1}{c} {\xr}&
\multicolumn{1}{c} {{\it Red} Sample}&
\multicolumn{1}{c} {Total} \\
Type& Sample$^\ast$ &   & Sample \\ 
& (1) & (2) & (3) \\
\hline  
\nh~$>10^{22}$  & 50{\%}  & 93{\%} & 66{\%} \\
CT AGNs        & 13{\%}  & 27{\%} & 18{\%} \\
QSO2s          & 43{\%}  & 27{\%} & 37{\%} \\
N. of Sources   & 23     & 15  & 38 \\
\hline  
\end{tabular}}            
Percentage of objects for each source type found in the: (Col.~1) \mbox{\xr}~sample (e.g. Sect.~5); (Col.~2) the \xr~undetected {\it Red} sample (i.e. sources showing log($F_{5.8}$/$F_{3.6}) > 0.2$ and log($F_{8}$/$F_{4.5}) > 0.2$); (Col.~3) the combined (i.e. \xr+undetected {\it Red}) sample.
$^\ast$For the \xr~sample we considered the conservative values derived using the lowest value in 90{\%} confidence level for the \nh~parameter.
\end{table}