\begin{table}%t2
%\centering
\par
\caption{\label{tab:sim}Results of Monte-Carlo simulations for power-law 
clouds with $\gamma=-2.8$.}
\begin{tabular}{cccccccc}
\hline\hline\noalign{\smallskip}
\multicolumn{8}{c}{$\gamma=-2.8$, $b=1.0$~km~s$^{-1}$, $\Delta EW_{\rm lim}=4.4$~m\AA}
\\\hline\noalign{\smallskip}
$\langle N\rangle$ & $\Delta N$ & $\langle EW \rangle$ &$\overline{\Delta EW}$ & $\Delta EW_{99}$ &
  $P_t$ & $P_0$ & $P_{30}$ 
\\
\multicolumn{2}{c}{(10$^{12}$ cm$^{-2}$)} & m\AA & m\AA & m\AA &\%  & \%  & \% \\  
\hline
0.1 & 0.1 & 16.3 & 0.6 (0.3) & 2.2 & --    & --   & --   \\
0.1 & 0.2 &      & 1.3 (0.6) & 4.5 & 1.5  & --   & --   \\
1.0 & 1.0 & 57.7 & 0.7 (0.4) & 2.7 & --    & --   & --   \\
1.0 & 2.0 &      & 1.5 (0.8) & 8.0 & 5.0  & 2.1 & 1.1 \\
10.0&10.0 & 85.7 & 0.6 (0.3) & 1.9 & --    & --   & --   \\ 
10.0&20.0 &      & 1.1 (0.5) & 5.1 & 1.8  & 0.6 & 0.2 \\ 
\hline
\noalign{\smallskip}
\multicolumn{8}{c}{$\gamma=-2.8$, $b=5.0$~km~s$^{-1}$, $\Delta {\it EW}_{\rm lim}=5.2$~m\AA}\\
\hline
0.1 & 0.1 & 18.9 & 0.9 (0.4) &  3.1 & --    & --    &  --  \\
0.1 & 0.2 &      & 1.7 (0.8) &  6.2 &  2.3 &  0.1 &  --  \\
1.0 & 1.0 & 138.0& 4.6 (2.1) & 15.6 & 40.7 & 22.2 &  9.8\\
1.0 & 2.0 &      & 9.1 (4.3) & 33.9 & 77.1 & 56.1 & 40.3\\
10.0&10.0 & 334.0& 3.1 (1.4) & 11.1 & 19.2 &  7.1 &  2.4\\ 
10.0&20.0 &      & 6.3 (3.1) & 32.6 & 60.3 & 40.6 & 25.2\\ 
\hline
\end{tabular}
 \tablefoot{Equivalent width variations are peak-to-peak 
(see Sect.~\ref{sec:patchy}).
 Values in parenthesis indicate the semi-inter-quartile range.} \vspace*{-1.5mm}
\end{table}