\begin{table}%t11
%\centering
\par
\caption {\label{tab11}Column densities deduced from the 
model described in Sect.~5.4, as a function of the
phase of the system. The columns are in units of 10$^{22}$~cm$^{-2}$.}
\begin{tabular}{l@{\hspace{0.1cm}}cccccccc}
\hline\hline
No.& Phase & $N_{{\rm W}}$ & $N_{{\rm W}}$ & $N_{{\rm W}}$ &
$N_{{\rm W}}$ & $\sim$$ N_{{\rm H}}$ & $N_{{\rm W}}$ & Fraction \\
& & S70 & R70 & S85 & R85 & R85 & Obs. & \\
\hline
I & 0.497 & 0.30 & 0.28 & 0.32 & 0.30 & 0.48 & 0.126 & (0.43) \\
II & 0.582 & 0.31 & 0.29 & 0.32 & 0.30 & 0.49 & 0.135 & (0.44) \\
VI & 0.680 & 0.34 & 0.33 & 0.36 & 0.34 & 0.55 & 0.135 & (0.40) \\
VII & 0.765 & 0.41 & 0.39 & 0.43 & 0.41 & 0.66 & 0.234 & 0.57 \\
III & 0.828 & 0.51 & 0.50 & 0.53 & 0.52 & 0.84 & 0.501 & 0.96 \\
IV & 0.903 & 0.85 & 0.86 & 0.90 & 0.91 & 1.46 & 0.575 & 0.63 \\
V & 0.994 & 9.33 & 8.54 & 20.9 & 28.9 & 46.5 & 0.832 & 0.03 \\
\hline
\end{tabular}
\end{table}