\begin{table}%t4
\caption{Percentage of $\beta$ Cephei stars among the number of B stars in the same spectral range for different open clusters.}\label{table:estad:cumulos}
%\centering
\small
\begin{tabular}{cc}
\hline
\hline
 Cluster & \% $\beta$ Cep \\
\hline
NGC 884   & 12--14\%  \\
NGC 869   &  5--7\%   \\ 
NGC 663   &  9--12\%  \\
NGC 3293  &  25\%    \\
NGC 4755  &  25--30\% \\
NGC 6231  &  10--15\% \\
NGC 2362  &   0\%    \\
\hline
\end{tabular}
\end{table}