\begin{table} %t11
\par
%\centering
\par
\caption{Mean (M-L) space velocity components, $\langle U\rangle, \langle V\rangle, 
\langle W\rangle$, and velocity dispersions, $\sigma_U$, $\sigma_V$, $\sigma_W$, 
of the different age groups in \kms .
\label{uvwmean}}
$$ 
\begin{tabular}{lr@{ $\pm$ }lr@{ $\pm$ }lr@{ $\pm$ }lr@{ $\pm$ }lr@{ $\pm$ }lr@{ $\pm$ }l} 
\noalign{\smallskip}     
\hline 
\hline 
\noalign{\smallskip}    
       & \multicolumn{2}{c}{$\langle U \rangle$} & \multicolumn{2}{c}{$\sigma_U$} &\multicolumn{2}{c}{$\langle V \rangle$} 
       &   \multicolumn{2}{c}{$\sigma_V$} & \multicolumn{2}{c}{$\langle W \rangle$} & \multicolumn{2}{c}{$\sigma_W$}\\ 
\noalign{\smallskip}    
\hline 
\noalign{\smallskip}    
PMS      &  $-$1.9 & 2.6  &   4.2 & 3.1  &  +0.2 & 2.2  &  2.9 & 2.5  &  +0.0 & 1.7  &  2.4& 2.1     \\
Pl\_ZAMS &  $-$1.5 & 4.1  &  11.9 & 3.8  &  $-$4.4 & 4.8  & 14.6 & 4.6  &  +1.1 & 3.2  &  9.3 & 2.9  \\
UMa      &  +18.2 & 6.6 &  12.1 & 11.1  &  $-$1.2 & 10.8 & 22.1 & 10.6 &  $-$5.2 & 10.5 &  21.8 &  10.1   \\
Hya+:\\
\multicolumn{1}{r}{dwarfs} &  +5.5 & 7.0  &  22.4 & 6.6  &  $-$7.9 & 5.3  & 16.3 & 4.6  &  +6.4 & 8.8  &  29.2 & 7.8   \\
\multicolumn{1}{r}{giants} &  +4.5 & 11.7  &  28.4 & 12.9  &  $-$15.0 & 8.9  & 19.2 & 8.1  &  +0.3 & 5.8  &  13.4 & 6.2   \\
\noalign{\smallskip}    
\hline 
\noalign{\smallskip}    
\end{tabular}
$$
\end{table}