\begin{table}%t4
%\centering
\par
\caption{\label{tab4}Ratios of second and third moments about the mean divided
by the mean, $R_2$ and $R_3$, for the data and for the SDE model
using 2000 sample paths.}
\begin{tabular}{lllll}
\hline \hline\noalign{\smallskip} Cycle  & $R_2$ (data) & $R_3$ (data) & $R_2$ (SDE) &
$R_3$ (SDE)
\\  \hline\noalign{\smallskip}
1943--1953 & 18.10 &  582.60   & 17.05 &  714.13  \\
1954--1964 & 16.47 &  363.03 & 12.64 &  423.79 \\
1965--1975 & 12.31 &  198.04  & 12.57 &  421.76 \\
\hline
\end{tabular}
\end{table}