\begin{table}%t1
\caption{\label{tab1}Distribution of the two groups according to the Joy's law.}
\par
%\centerline
{\small
\begin{tabular}{llllll}
\hline
\hline
           &       $\textrm{Joy}^{a}$   &   Joy     &    $\textrm{Non-Joy}^{b}$   &  Non-Joy &  \\
$\textrm{Hemisphere}^{c}$   &         S &   N       &          S &       N  &  Total   \\
\hline
         A & 17 (77\%) &  11 (79\%)& 7 (63\%)   & 8 (73\%) &  43 (74\%)\\
         B & 5  (23\%) &  3 (21\%) & 4 (37\%)   & 3 (27\%) &  15 (26\%)\\
     Total &         22 & 14       &       11   &      11  & 58 (100\%)\\
\hline
\end{tabular}}
\par
\medskip
$^{a}$~``Joy'' means that active regions satisfy Joy's law.
$^{b}$~``Non-Joy'' means that active regions disobey Joy's law.
$^{c}$~N (S) stands for the northern (southern) hemisphere.
\end{table}