\begin{table}%T1
\caption{\label{t-fitrings}The field strengths in the best-fit model in which the
  field has circular symmetry.}
  %\centering
\par
\begin{tabular}{llrrcrrrrrr}
\hline
\hline\noalign{\smallskip}
Class   & $n_{\rm e}$-model & \multicolumn{1}{c}{4--5} & \multicolumn{1}{c}{5--6} & \multicolumn{1}{c}{6--7} & \multicolumn{1}{c}{7--8} & \multicolumn{1}{c}{8--9} & \multicolumn{1}{c}{9--10} & \multicolumn{1}{c}{10--11} & \multicolumn{1}{c}{11--12} & $\langle |\Delta RM|\rangle$ \\
        &  & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & \multicolumn{1}{c}{kpc} & rad m$^{-2}$ \\ 
\hline
EGS    & CL02        & $-$1.9~$\pm$~0.3 &  0.7~$\pm$~0.5 & $-$1.2~$\pm$~0.4 & 0.3~$\pm$~0.7 & $-$3.4~$\pm$~1.5 & 15.9~$\pm$~6.3 & 12.2~$\pm$~12.7 &  2.3~$\pm$~16.9 & \multicolumn{1}{c}{191} \\
\par
EGS    & cst.        & $-$2.8~$\pm$~0.6 &  2.6~$\pm$~0.6 & $-$1.4~$\pm$~0.5 & 2.7~$\pm$~0.8 & 2.1~$\pm$~1.3 & 41~$\pm$~17 & $-$16.7~$\pm$~23.8 &  $-$62~$\pm$~25 & \multicolumn{1}{c}{189} \\
\par
PSR~   & CL02    & $-$5.3~$\pm$~4.2 &  1.2~$\pm$~0.4 & $-$2.1~$\pm$~0.3 &  0.4~$\pm$~0.3 &  0.3~$\pm$~0.3 & $-$3.2~$\pm$~4.0 & 31~$\pm$~24   & $-$54~$\pm$~50 & \multicolumn{1}{c}{156} \\
\par
PSR~   & cst.    & $-$2.9~$\pm$~0.8 &  1.7~$\pm$~0.5 & $-$2.0~$\pm$~0.4 &  0.3~$\pm$~0.3 &  0.1~$\pm$~0.4 & 1.9~$\pm$~1.9 & $-$1.9~$\pm$~4.3   & 3.2~$\pm$~5.5 & \multicolumn{1}{c}{165} \\
\hline 
\end{tabular}
\end{table}