\begin{table}%t1
%\centering
\par
\caption{Multiplicity among \textit{Hipparcos} members of the three subgroups of Sco~OB2. 
    The columns
    show the subgroup name (Upper Scorpius; Upper Centaurus Lupus; Lower
    Centaurus Crux), the distance \citep[see][]{dezeeuw1999}, the age
    (\citealt{degeus1989,preibisch2002} for US; \citealt{mamajek2002} for UCL and LCC), the number
    of known single stars, binary stars, triple systems and $N>3$ systems, and
    the binary statistics (see Sect.~\ref{section: binarystatistics}), after inclusion of the
    new results presented in this paper. \label{table: statistics} }
  \begin{tabular}{l cc cccc cc c}
    \hline\hline
          & $D$  & Age  & $S$ & $B$ & $T$ & $>$3 & $F_{\rm M}$ & $F_{\rm NS}$ & $F_{\rm C}$ \\
          & (pc) &(Myr) & \\
    \hline
    US    & 145  & 5--6     & 64    & 44    & 8     & 3     & 0.46  & 0.67  & 0.61\\
    UCL   & 140  & 15--22   & 132   & 65    & 19    & 4     & 0.40  & 0.61  & 0.52\\
    LCC   & 118  & 17--23   & 112   & 57    & 9     & 1     & 0.37  & 0.56  & 0.44\\
    \hline
    all   &      &          & 308   & 166   & 36    & 8     & 0.41  & 0.61  & 0.51\\
    \hline
  \end{tabular}
\par
\end{table}