\begin{table}%t7
  \caption{\label{tab:rates}The detection rates.}  
  %\centerline
{                    
  \begin{tabular}{cccccc} 
    \hline\hline                 
    Field  &Sample$^{\star}$ &00     &10   &11   &01   \\    
           &                &(\%)   &(\%) &(\%) &(\%) \\    
    \hline                         
    02$^{\rm h}$          &914 &70.5 &16.0 &12.7 &0.8\\
    08$^{\rm h}$          &692 &66.8 &19.2 &12.4 &1.6\\
    14$^{\rm h}$          &923 &70.7 &18.2 &10.6 &0.5\\
    20$^{\rm h}$          &905 &67.8 &19.6 &11.3 &1.3\\
    \\
    Total                   &3434 &69.0 &18.3 &11.7 &1.0 \\
    \hline                                  
  \end{tabular}}
\par
  \medskip
   The detection threshold for either frequency has been set to
    5$\sigma$ with sigma being the error in the individual
    measurement as given by Eq.~(\ref{eq:finalerror}).\\
  $^\star$ The sample includes measurements that are {\it
      clean} or {\it de-confused}. The de-confusion includes also the
    rare cases of having the source observed at different parallactic
    angle.
\end{table}