\begin{table}%t2
\caption{The frequency of galactic B-type stars with {\ion{O}{vi}}
wind \mbox{features}. \label{result_table}}
%\centerline
{
\begin{tabular}{lllll} \hline\hline
Spectral type bin   &
&
   \multicolumn{3}{c}{ \%~(Det./Tot.)$^a$ } \\ \cline{3-5}                     &
& Zs03~$^b$ &
& L03~$^c$ \\ \hline B0 -- B1 (I-III)    & & $\ga$34 (13/38) & &  $\ga$86 (6/7) \\ 
B0 -- B1 (IV-V)     & & $\ga$19 (6/31)  & &  $\ga$56 (5/9) \\ 
B1 -- B2 (I-III)    & & $\ga$20 (9/44)  & &  $\ga$67 (4/6) \\ 
B1 -- B2 (IV-V)     & &  0      (0/22)  & &  0       (0/3) \\
B2 -- B9 (I-V)      & &  0     (0/100)  & &  0       (0/4) \\ \hline 
\end{tabular}}
$^a$ -- Det.: the number of stars with detections; Tot.: total number of 
objects surveyed.
\par
$^b$ -- Present study. Includes cases with unambigous and very likely 
detections.
\par
$^c$ -- Variability study of {\cite{leh03}}. The statistics are for Galactic
stars only.
\end{table}