\begin{table}%t8
\caption{Rate of AGN candidates  in the literature from FIR colour.}\label{tabla:color-rate}
\small %\centerline
 {\begin{tabular}{lccc}
\hline \hline \noalign{\smallskip}
\multicolumn{1}{c}{} &\multicolumn{1}{c}{}&\multicolumn{2}{c}{Rate of AGN-candidates$^{\rm 1}$}\\
Sample & Environment  & Total  & 2~Jy cutoff \\
\hline
AMIGA & Isolated & 28.4 & 14.3 \\
Condon 1991 & -- & 21.8 & 12.4  \\
Yun 2001 & -- & 15.9 & 15.9  \\
Condon 2002 & -- & 13.3 & --  \\
Drake 2003 & -- & 45.0 & 22.6  \\
Andersen 1995 & Cluster \& group (poor) & 56.5 & --\\
& Cluster \& group (rich) & 75.0 & --  \\
Reddy 2004 & \mbox{X-ray} clusters & 59.0 & 20.0\\
\hline
\end{tabular}}
\medskip
$^{\rm 1}$ Figures given in percentages.
\end{table}