\begin{table}%T5
%\centering
\par
\caption{Mean radial velocities (in~${\rm km~ s^{-1}}$) of the most numerous
species, absorption and emission of Cr~{\scriptsize II,} Fe~{\scriptsize II},
and {[}Fe~{\scriptsize II}{]} emission. The number of lines is given
in parentheses.\label{Tab_Mean-radial-velocities}}
\begin{tabular}{llll}
\hline\hline 
&
1995&
1999&
2001\\
\hline
Cr~{\scriptsize II} a&
$25.4\pm1.3$(10)&
$25.4\pm1.4$(11)&
$21.8\pm0.8$(4)\\
Cr~{\scriptsize II} e&
$23.6\pm1.3$(11)&
$23.1\pm1.2$(11)&
$18.6\pm2.0$(4)\\
Fe~{\scriptsize II} a&
$29.4\pm0.7$(58)&
$28.2\pm0.6$(59)&
$24.2\pm0.6$(35)\\
Fe~{\scriptsize II} e&
$25.8\pm0.5$(69)&
$24.5\pm0.4$(64)&
$21.6\pm0.5$(47)\\
{[}Fe~{\scriptsize II}{]}&
$21.5\pm0.5$(85)&
$22.5\pm0.4$(77)&
$21.4\pm0.3$(32)\\\hline 
\end{tabular}
\end{table}