\begin{table}%t4
\caption{\label{table4}Comparison of Maxwellian averaged collision strengths in \mbox{LS-coupling} for excitation from the ground term~3s$^2$3p~$^2$P$^\circ$.}  
%\centering
\small
\begin{tabular}{lrrrr}
\hline\hline \noalign{\smallskip}
Upper term & $T$ (K) & Model 9& \multicolumn{2}{c}{Difference (\%)}\\
 & & & model 1& model 8\\
\hline
\noalign{\smallskip}
3s3p$^2$~$^4$P  &  5000 & 4.44E+0 &   1.2 &   5.7 \\
                & 10~000 & 4.36E+0 &   1.4 &   5.9 \\
                & 20~000 & 4.43E+0 &  --2.4 &  --5.2 \\
3s3p$^2$~$^2$D  &  5000 & 1.19E+1 &  --8.2 &  --39.8 \\
                & 10~000 & 1.18E+1 &  --3.1 &  --36.4 \\
                & 20~000 & 1.10E+1 &   3.9 &  --34.2 \\
3s$^2$4s~$^2$S  &  5000 & 2.17E+0 &  11.0 &   25.3 \\
                & 10~000 & 2.18E+0 &  16.3 &   27.0 \\
                & 20~000 & 2.21E+0 &  15.2 &   33.1 \\
3s3p$^2$~$^2$S  &  5000 & 3.32E+0 & --38.1 &  --52.4 \\
                & 10~000 & 3.08E+0 & --32.7 &  --54.7 \\
                & 20~000 & 2.95E+0 & --24.4 &  --59.2 \\
\hline
\end{tabular}
\end{table}