\begin{table}%t5
\caption{\label{table5}Comparison of Maxwellian averaged collision strengths in \mbox{$JJ$-coupling} from present calculation (Present), \citeauthor{tayal08} (\citeyear{tayal08}; Tayal), and 
\citeauthor{dufton} (\citeyear{dufton}; DK).}  
%\centering
\small
\begin{tabular}{lrccc}
\hline\hline \noalign{\smallskip}
Upper level & $T$ (K) & Present & Tayal & DK\\
\hline
\noalign{\smallskip}
3s$^2$3p~$^2$P$^\circ_{3/2}$&  5000 & 4.55 &6.19&5.60 \\
                        & 10~000 & 4.45 &6.09&5.70 \\
                        & 20~000 & 4.42 &5.97&5.77 \\
3s3p$^2$~$^4$P$_{1/2}$  &  5000 & 0.401 &0.512&0.550 \\
                        & 10~000 & 0.398 &0.515&0.516 \\
                        & 20~000 & 0.392 &0.502&0.466 \\
3s3p$^2$~$^4$P$_{3/2}$  &  5000 & 0.612 &0.812&0.832 \\
                        & 10~000 & 0.609 &0.789&0.780 \\
                        & 20~000 & 0.602 &0.769&0.706 \\
3s3p$^2$~$^4$P$_{5/2}$  &  5000 & 0.441 &0.615&0.571 \\
                        & 10~000 & 0.458 &0.595&0.534 \\
                        & 20~000 & 0.477 &0.589&0.488 \\
3s3p$^2$~$^2$D$_{1/2}$  &  5000 & 1.82 &2.77&2.76 \\
                        & 10~000 & 1.82 &2.74&2.74 \\
                        & 20~000 & 1.75 &2.50&2.58 \\
3s3p$^2$~$^2$D$_{3/2}$  &  5000 & 2.05 &2.94&2.45 \\
                        & 10~000 & 2.14 &2.98&2.44 \\
                        & 20~000 & 2.14 &2.80&2.30 \\
3s$^2$4s~$^2$S$_{1/2}$  &  5000 & 0.910 &1.02&1.24 \\
                        & 10~000 & 0.865 &1.06&1.20 \\
                        & 20~000 & 0.857 &0.979&1.04 \\
3s3p$^2$~$^2$S$_{1/2}$  &  5000 & 0.887 &0.102&0.716 \\
                        & 10~000 & 0.899 &0.988&0.840 \\
                        & 20~000 & 0.916 &0.988&0.902 \\
\hline
\end{tabular}
\end{table}