\begin{table}%t2
\caption{Results for the polar region runs as functions of the shock
  velocity, compression ratio and oblique angle.  Shown are the
  no. HEP~escaping to upstream~(us) and downstream~(ds) regions and maximum
  energies reached (in~$\log{}_{10}({\rm eV})$), respectively. Omitted results show no
  acceleration.}
\label{table:apresults}
%\centering
\small
\begin{tabular}{c c c c c c c }
\hline \hline
$V_{\rm s}$ & $r$ & $\theta _{\rm n}$ & \% us & $E_{\rm max,us}$ & \% ds & $E_{\rm max,ds}$ \\
\hline
400  & 3 & 30 & 0.00 & 0.00 & 8.28 & 5.78 \\
     &   & 45 & 1.30 & 6.27 & 32.6 & 6.21 \\
     &   & 60 & 20.7 & 6.60 & 34.4 & 6.32 \\
     &   & 70 & 44.4 & 6.72 & 15.1 & 6.66 \\
700  &   & 30 & 0.12 & 6.10 & 21.8 & 6.11 \\
     &   & 45 & 8.45 & 6.45 & 39.3 & 6.28 \\
     &   & 60 & 34.2 & 6.69 & 21.3 & 6.38 \\
     &   & 70 & 23.7 & 6.72 & 7.04 & 6.31 \\
1000 &   & 30 & 0.95 & 6.29 & 31.0 & 6.22 \\
     &   & 45 & 19.1 & 6.49 & 33.6 & 6.31 \\
     &   & 60 & 22.3 & 6.68 & 11.8 & 6.36 \\
400  & 4 & 30 & 0.03 & 6.01 & 11.6 & 5.82 \\
     &   & 45 & 3.53 & 6.25 & 35.0 & 6.14 \\
     &   & 60 & 28.7 & 6.59 & 34.3 & 6.27 \\
     &   & 70 & 43.4 & 6.73 & 25.3 & 6.69 \\
700  &   & 30 & 0.78 & 6.16 & 27.9 & 6.07 \\
     &   & 45 & 14.6 & 6.42 & 40.7 & 6.29 \\
     &   & 60 & 43.0 & 6.72 & 21.8 & 6.35 \\
     &   & 70 & 32.6 & 6.80 & 15.9 & 6.91 \\
1000 &   & 30 & 3.23 & 6.26 & 36.2 & 6.18 \\
     &   & 45 & 26.2 & 6.48 & 33.6 & 6.33 \\
     &   & 60 & 33.8 & 6.76 & 16.1 & 6.39 \\
\hline
\end{tabular}
\end{table}