\begin{table}%t3
\caption{Comparisons of accumulated weight statistics for parallax
measurements of single stars with five-parameter solutions in the old and 
the new Hipparcos reductions. The errors are given in mas.}
\small%\centering
\par
\begin{tabular}{rrrrrr}
\hline\hline
& \multicolumn{2}{c}{Observations} & \multicolumn{2}{c}{Mean error} & Weight\\
Interval & New & Old & New & Old & ratio\\
\hline
All & 101783 & 100037 & 0.66 & 0.96 & 2.16 \\
${\rm Hp}\ge 9$ & 34799 & 33347 & 1.23 & 1.33 & 1.23 \\
${\rm Hp}<9$ & 66984 & 66690 & 0.56 & 0.86 & 2.36 \\
${\rm Hp}<7$ & 10883 & 11127 & 0.33 & 0.70 & 4.29 \\ 
\hline
\end{tabular}
\label{tab:weights}
\end{table}