\begin{table}%t3
%\centering
\par
\caption{The residual polarization.\label{tab:stars}}
\begin{tabular}{lrrrr}
\hline \hline 
Observing run & $\overline{q}_{\star}$ \ & $\overline{u}_{\star}$ \ & 
    $\overline{\sigma}_{\star}$ \ & $n_{\star}$ \\
 mm--yyyy    &     (\%) & (\%) & (\%) &
\\[0.05in] \hline \\[-0.10in]
08--2000 & $+$0.04 & $-$0.01 & 0.19 & 30 \\
03--2002 & $-$0.07 & $+$0.07 & 0.12 & 57 \\
05--2002 & $-$0.05 & $+$0.05 & 0.12 & 31 \\
08--2003 & $-$0.10 & $-$0.18 & 0.24 & 39 \\
10--2003 & $+$0.04 & $-$0.08 & 0.20 & 31 \\
\hline
\end{tabular}
\end{table}