\begin{table}%t5
%\centering
\par
\caption{\label{tabtime}High-mass young objects in NGC~6334 - NGC~6357 ($M > 200$~\msun) at various stages of the high-mass star formation process.}
\begin{tabular}{c c c c c}
\hline \hline\noalign{\medskip}
&  Starless   & High-mass IR-quiet & High-luminosity & O-B3 stars  \\
&  clumps       & protostars       & IR protostars    &           \\
\hline 
NGC~6334 -- NGC~6357 &    &    &    &            \\
Number         &  1 & 6 & 9 & 300\\
$\langle size \rangle$  & 0.29~pc     &  0.38 pc       &  0.37~pc     &   \\
Statistical lifetime\footnotemark[1] & $\sim$$1 \times 10^{4}$~yr &  $\sim$$6 \times 10^{4}$~yr & $\sim$$9 \times 10^{4}$~yr & $\sim$$3 \times 10^{6}$~yr \\
$\langle M\rangle$ & 242~\msun &  571~\msun  & 664~\msun & \\
$\langle n_{\rm H_{2}}\rangle$ & $4.1 \times 10^{4}$~cm$^{-3}$ & $1.1 \times 10^{5}$~cm$^{-3}$ &  $1.9 \times 10^{5}$~cm$^{-3}$ & \\
Free-fall time\footnotemark[2]      & $4.9 \times 10 ^{4}$~yr &  \multicolumn{2}{c}{$8 \times 10^{4}$~yr} & \\
\hline
Cygnus~X  &    &    &    &            \\
Number\footnotemark[3] & 10             & 17      & 25 &  660 \\
Statistical lifetime                & $3 \times 10^{4}$~yr & $\sim$$5.1 \times 10^{4}$~yr & $\sim$$7.6 \times 10^{4}$~yr & ($2 \pm 1) \times 10^{6}$~yr\\
Free-fall time  & $4 \times 10^{5}$~yr & \multicolumn{2}{c}{$8\times 10^{4}$~yr} & \\  
\hline\noalign{\smallskip}
Statistical lifetime & $2 \times 10^{5}$~yr & $2 \times 10^{4}$~yr & $2 \times 10^{5}$~yr &  \\
in dark clouds   &     &   &   &    \\ 
\hline
\end{tabular}
\tablefoot{\tablefoottext{1}{Lifetime calculated relative to the known age of the stars in the young cluster Pismis~24 (cf. Massey et~al. \cite{Massey} and
Ahumada et~al. \cite{Ahumada}) using the census given in line~1.}
\tablefoottext{2}{Free-fall time measured from the mean values of the
volume-averaged density given line~5: $t_{\rm free-fall} = \sqrt{\frac{3
\pi}{32 G \langle \rho \rangle}}$} \tablefoottext{3}{The numbers of OB3~stars in Cygnus~X and thus the statistical lifetimes of high-mass young stellar objects have been corrected from the values given in Motte et~al. (\cite{Motte07}).} }
\end{table}