\begin{table}
\caption{\label{table:1}Values of $N_i$ producing the spatial distributions in Fig.~\ref{fig4}.}             \small
%\centering
\par
\begin{tabular}{r r r r}   
\hline\hline               
$i$ & $N_i$ & $N_i$ & $N_i$ \\
\hline                         
1   &  5  & 3 &	 3  \\
2   &  5  & 3 &  2  \\
3   &  5  & 3 &  2  \\
4   &  4  & 2 &  1  \\
5   &  4  & 2 &  1  \\
6   &  3  & 2 &  1  \\
7   &  3  & 2 &  1  \\
8   &  6  & 7 &  7  \\
9   &  4  & 4 &  6  \\
10  &  4  & 3 &  2  \\
11  &  3  & 2 &  1  \\
12  &  3  & 1 &  1  \\
13  &  4  & 3 &  2  \\
14  &  3  & 4 &  6  \\
15  &  4  & 3 &  2  \\
16  &  4  & 2 &  2  \\
17  &  4  & 4 &  5  \\
18  &  4  & 3 &  2  \\
19  &  5  & 3 &  2  \\
20  &  5  & 3 &  3  \\
21  &  5  & 4 &  2  \\
22  &  6  & 6 &  8  \\
23  &  7  & 4 &  2  \\
24  &  7  & 6 &  4  \\
25  &  7  & 5 &  4  \\
26  &  6  & 7 &  7  \\
27  &  7  & 8 &  12 \\
28  &  8  & 5 &  3  \\
29  &  8  & 9 &  12 \\
30  &  8  & 7 &  4  \\
31  &  8  & 8 &  5  \\
\hline                                  
\end{tabular}
\end{table}