\begin{table}%T4
%\centering
\par
\caption{Flux (in $10^{\textrm{-}13}~{\rm erg~ cm^{2}~ s^{-1}}$) and
velocity (in~${\rm km~ s^{-1}}$) variations of the Na I D1 and
D2 components.\label{Tab_NaI}}
\par
\begin{tabular}{lllllll}
\hline\hline 
&
1995 %\foreignlanguage{frenchb}{}
flux&
1995 vel&
1999 flux&
1999 vel&
2002 flux&
2002 vel\\
\hline
Na I D1 a&
--0.88&
31&
--1.85&
24&
--2.60&
24\\
Na I D1 e&
2.77&
48&
4.84&
4&
2.86&
9\\
Na I D2 a&
--1.26&
31&
--2.05&
22&
--2.55&
22\\
Na I D2 e&
3.34&
48&
5.24&
5&
2.88&
6\\\hline
\end{tabular}
\end{table}