\begin{table}%t1
\caption{\label{tab:vel}Means, standard deviations and covariances for $U$, $V$
  and $W$~velocities corresponding to the high-quality volume
  limited sample of~\raveVelVol stars (see Sect.~\ref{sec:results}).
}\small%\centering
\par
 \begin{tabular}{cccc}
\hline\hline\noalign{\smallskip}
Mean & $\overline{U}$ & $\overline{V}$ & $\overline{W}$\\
\noalign{\smallskip}
(\kms) & $-12.0 \pm 0.6$ & $-20.4 \pm 0.5$ & $-7.8 \pm 0.3$\\\hline
\noalign{\smallskip}
Standard Deviation & $\sigma_U$ & $\sigma_V$ & $\sigma_W$\\\noalign{\smallskip}
(\kms) & $36.7 \pm 0.6$ & $25.6 \pm 0.8$ & $19.1 \pm 0.4$\\\hline\noalign{\smallskip}
Covariance & $\sigma^2_{UV}$ & $\sigma^2_{UW}$ & $\sigma^2_{VW}$\\\noalign{\smallskip}
$(\textrm{km$^2$~s$^{-2}$})$ & $108.0 \pm 25.7$ & $-19.7 \pm 17.3$ & $12.8 \pm 16.2$\\
\hline
 \end{tabular}
\end{table}