\begin{table}%t9
%\centering
\par
\caption{\label{rel-abundance}Summary of the relative abundances in the three DLA systems studied.} 
{\scriptsize
\begin{tabular}{l l | l l | l l | l l}
\hline\hline
\multicolumn{2}{c}{{\footnotesize Quasar}}    & 
\multicolumn{2}{c}{{\footnotesize Q0100+13}}  & 
\multicolumn{2}{c}{{\footnotesize Q1331+17}}  & 
\multicolumn{2}{c}{{\footnotesize Q2231$-$00}} 
\smallskip
\\ 
\hline
\multicolumn{2}{c}{{\footnotesize $z_{\rm abs}$}} & 
\multicolumn{2}{c}{{\footnotesize 2.309}}         & 
\multicolumn{2}{c}{{\footnotesize 1.776}}         & 
\multicolumn{2}{c}{{\footnotesize 2.066}} \\
\multicolumn{2}{c}{{\footnotesize $\log N$(\ion{H}{i})}}      & 
\multicolumn{2}{c}{{\footnotesize 21.37}{\scriptsize (0.08)}} & 
\multicolumn{2}{c}{{\footnotesize 21.14}{\scriptsize (0.08)}} & 
\multicolumn{2}{c}{{\footnotesize 20.53}{\scriptsize (0.08)}} 
\smallskip
\\
\hline
%\multicolumn{8}{l}{{\footnotesize Relative Abundances}}
%\smallskip
%\\
%\hline \\
 & {\footnotesize [Zn/Fe]$_{\rm obs}$} & 
 & {\footnotesize $+0.25$(0.04)} & 
 & {\footnotesize $+0.75$(0.05)} & 
 & {\footnotesize $+0.45$(0.07)} \\
 & {\footnotesize [Zn/Fe]$_{\rm cor}$ (E00, E11)} &
 & {\footnotesize $+0.10$} & & {\footnotesize $+0.10$} & & {\footnotesize $+0.10$} \\
 & {\footnotesize [Zn/Fe]$_{\rm cor}$ (S00, S11)} &
 & {\footnotesize $+0.00$} & & {\footnotesize $+0.00$} & & {\footnotesize $+0.00$} \\
 & {\footnotesize [Ni/Fe]$_{\rm obs}$} & 
 & {\footnotesize $+0.07$(0.02)} & 
 & {\footnotesize $+0.07$(0.09)} & 
 & {\footnotesize $+0.07$(0.07)} \\
 & {\footnotesize [Ni/Fe]$_{\rm cor}$ (E00)} &
 & {\footnotesize $+0.05$(0.02)} & 
 & {\footnotesize $+0.01$(0.02)} & 
 & {\footnotesize $+0.03$(0.04)} \\
 & {\footnotesize [Ni/Fe]$_{\rm cor}$ (E11)} &
 & {\footnotesize $+0.07$(0.02)} & 
 & {\footnotesize $+0.07$(0.09)} & 
 & {\footnotesize $+0.07$(0.07)} \\
 & {\footnotesize [Ni/Fe]$_{\rm cor}$ (S00)} &
 & {\footnotesize $+0.04$(0.01)} & 
 & {\footnotesize $+0.00$(0.01)} & 
 & {\footnotesize $+0.02$(0.03)} \\
 & {\footnotesize [Ni/Fe]$_{\rm cor}$ (S11)} &
 & {\footnotesize $+0.07$(0.02)} & 
 & {\footnotesize $+0.08$(0.09)} & 
 & {\footnotesize $+0.07$(0.07)} \\
 & {\footnotesize [Mn/Fe]$_{\rm obs}$} &
 & {\footnotesize ...}           & 
 & {\footnotesize $-0.15$(0.04)} & 
 & {\footnotesize $-0.16$(0.05)} \\
 & {\footnotesize [Si/Fe]$_{\rm obs}$} &
 & {\footnotesize $>$$-0.43$}      & 
 & {\footnotesize $+0.61$(0.03)} & 
 & {\footnotesize $+0.40$(0.05)} \\
 & {\footnotesize [Si/Fe]$_{\rm cor}$ (E00)} &
 & {\footnotesize $>$$-0.58$}      & 
 & {\footnotesize $+0.01$(0.03)} & 
 & {\footnotesize $+0.05$(0.09)} \\
 & {\footnotesize [Si/Fe]$_{\rm cor}$ (E11)} &
 & {\footnotesize $>$$-0.58$}      & 
 & {\footnotesize $-0.01$(0.05)} & 
 & {\footnotesize $+0.05$(0.09)} \\
 & {\footnotesize [Si/Fe]$_{\rm cor}$ (S00)} &
 & {\footnotesize $>$$-0.67$}      & 
 & {\footnotesize $-0.02$(0.01)} & 
 & {\footnotesize $-0.05$(0.07)} \\
 & {\footnotesize [Si/Fe]$_{\rm cor}$ (S11)} &
 & {\footnotesize $>$$-0.68$}      & 
 & {\footnotesize $-0.06$(0.04)} & 
 & {\footnotesize $-0.05$(0.08)} \\
 & {\footnotesize [Mg/Fe]$_{\rm obs}$} &
 & {\footnotesize $+0.44$(0.09)} & 
 & {\footnotesize $+0.83$(0.14)} & 
 & {\footnotesize ...} \\
 & {\footnotesize [Mg/Fe]$_{\rm cor}$ (E00)} &
 & {\footnotesize $+0.29$(0.11)} & 
 & {\footnotesize $+0.19$(0.14)} &
 & {\footnotesize ...} \\
 & {\footnotesize [Mg/Fe]$_{\rm cor}$ (E11)} &
 & {\footnotesize $+0.29$(0.11)} & 
 & {\footnotesize $+0.26$(0.16)} &
 & {\footnotesize ...} \\
 & {\footnotesize [Mg/Fe]$_{\rm cor}$ (S00)} &
 & {\footnotesize $+0.19$(0.11)} & 
 & {\footnotesize $+0.09$(0.12)} &
 & {\footnotesize ...} \\
 & {\footnotesize [Mg/Fe]$_{\rm cor}$ (S11)} &
 & {\footnotesize $+0.19$(0.11)} & 
 & {\footnotesize $+0.20$(0.17)} &
 & {\footnotesize ...} \\
 & {\footnotesize [Ti/Fe]$_{\rm obs}$} &
 & {\footnotesize $<$$-0.09$}      & 
 & {\footnotesize $<$$-0.45$}      & 
 & {\footnotesize $+0.70$(0.09)} \\
 & {\footnotesize [S/Zn]$_{\rm obs}$} &
 & {\footnotesize $+0.09$(0.07)} & 
 & {\footnotesize $+0.01$(0.12)} & 
 & {\footnotesize $+0.12$(0.14)} \\
 & {\footnotesize [S/Fe]$_{\rm obs}$} &
 & {\footnotesize $+0.34$(0.07)} & 
 & {\footnotesize $+0.76$(0.12)} & 
 & {\footnotesize $+0.62$(0.15)} \\
 & {\footnotesize [S/Fe]$_{\rm cor}$ (E00)} &
 & {\footnotesize $+0.19$(0.09)} & 
 & {\footnotesize $-0.02$(0.16)} & 
 & {\footnotesize $+0.25$(0.19)} \\
 & {\footnotesize [S/Fe]$_{\rm cor}$ (E11)} &
 & {\footnotesize $+0.19$(0.09)} & 
 & {\footnotesize $-0.10$(0.17)} & 
 & {\footnotesize $+0.25$ 0.19)} \\
 & {\footnotesize [S/Fe]$_{\rm cor}$ (S00)} &
 & {\footnotesize $+0.08$(0.09)} & 
 & {\footnotesize $-0.30$(0.17)} & 
 & {\footnotesize $+0.11$(0.19)} \\
 & {\footnotesize [S/Fe]$_{\rm cor}$ (S11)} &
 & {\footnotesize $+0.08$(0.09)} & 
 & {\footnotesize $-0.30$(0.17)} & 
 & {\footnotesize $+0.11$(0.19)} \\
 & {\footnotesize [N/S]$_{\rm obs}$} &
 & {\footnotesize $-0.83$(0.14)} & 
 & {\footnotesize $<$$-0.63$}      & 
 & {\footnotesize $<$$-0.85$} \\
 & {\footnotesize [N/Si]$_{\rm obs}$} &
 & {\footnotesize ...}      & 
 & {\footnotesize $<$$-0.48$} &
 & {\footnotesize $<$$-0.64$} \\
 & {\footnotesize [N/Si]$_{\rm cor}$ (E00)} &
 & {\footnotesize ...}      &
 & {\footnotesize $<$$-0.66$} & 
 & {\footnotesize $<$$-0.66$} \\
 & {\footnotesize [N/Si]$_{\rm cor}$ (E11)} &
 & {\footnotesize ...}      &
 & {\footnotesize $<$$-0.72$} & 
 & {\footnotesize $<$$-0.66$} \\
 & {\footnotesize [N/Si]$_{\rm cor}$ (S00)} &
 & {\footnotesize ...}      &
 & {\footnotesize $<$$-0.90$} & 
 & {\footnotesize $<$$-0.70$} \\
 & {\footnotesize [N/Si]$_{\rm cor}$ (S11)} &
 & {\footnotesize ...}      &
 & {\footnotesize $<$$-0.87$} & 
 & {\footnotesize $<$$-0.70$} \\
 & {\footnotesize [Cl/S]$_{\rm obs}$} &
 & {\footnotesize ...}       &
 & {\footnotesize $>$$ -0.11$} & 
 & {\footnotesize ...}           \\
\hline
\end{tabular}}
\end{table}