\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}