\begin{table}%t1
  \caption{\label{numbers}Number of galaxies classified as disturbed galaxies,
    undisturbed galaxies, and galaxies with a close companion pairs,
    in our three ranges of metallicity, and percentages (and
    respectives sampling errors) of disturbed galaxies with respect to
    the total number of disturbed and undisturbed galaxies.} 
  %\centering
\par
  \begin{tabular}{lccccc}
    \hline\hline
    &  Disturbed  &  Undisturbed  &  With close comp. & Total & $\%$ Disturbed \\
    \hline
    Total    &   46  & 123   & 22 & 191 & $27.2 \pm 3.4$ \\ 
    \hline
    high O/H   & 6  & 35  &  6 &  47    & $14.6 \pm 5.8$ \\
    medium O/H & 18 &  68 & 13 &  99    & $20.9 \pm 4.4$ \\
    low O/H    & 22 &  20 &  3 &  45    & $52.3 \pm 7.7$ \\
    \hline
  \end{tabular}
\end{table}