\begin{table}%t1
\caption{\label{tab:vollimnumb}Summary of the four volume-limited data samples; $M^*_{\rm ev} = -20.3 - 5~\log~h_{70}-1.1~z$.} 
%\centering
\small
\begin{tabular}{c c c c c }    
\hline\hline \noalign{\smallskip}                
                & Sample I  & Sample II & Sample III & Sample IV  \\   
 $M_{B}$ range  & $M_{B}\leq M_{\rm ev}^*+2.1$ & $M_{B}\leq M_{\rm ev}^*+1.5$ & $M_{B}\leq M_{\rm ev}^*+0.8$ & $M_{B}\leq M^*_{\rm ev}+0.2$ \\
    $z$ range   & $0.1\leq z\leq0.45$ & $0.1\leq z\leq0.6$ & $0.1\leq z\leq0.8$ & $0.1\leq z\leq 1.0$ \\                  
\hline                 
All galaxies       &     1798   &  2122     &  2616    &  2182  \\      
Isolated galaxies  &     315    &   442     &   431    &   326  \\
Group galaxies I   &     676    &   670     &   709    &   447  \\
Group galaxies II  &     218    &   237     &   412    &   447  \\
\hline                             
\end{tabular}
\end{table}