\begin{table}
%\centering
\par
\caption{Changes of quadrupole moments in the past.\label{quadr}}
\begin{tabular}{ccc}
\hline \hline
Interval   & $|\Delta P|$    & $|\Delta Q|$  \\
 years     &  [$10^{-5}$ day]        & [$10^{43}$ kg m$^2$]  \\
\hline
until 1942 &  19.4  &  88.6 \\
1952--1965  &  1.98  &  9.0 \\
1965--1976  &  1.75  &  8.0 \\
1976--1987  &  1.52  &  6.9 \\
1987--1996  &  1.34  &  6.1 \\
1996--2003  &  1.18  &  5.4 \\
\hline
\end{tabular}
\end{table}