\begin{table} 
\caption{Main secular frequencies~$g_i$ and~$s_i$ of La2004 determined over 20 Ma for the four inner planets, and over 50 Ma for the 5 outer planets (in arcsec yr$^{-1}$). ~$\Delta_{100}$ and~$\Delta_{250}$ 
are the observed variations of the frequencies over respectively 100 and 250~Myr. In the last column, the period 
of the secular term are  given.}
%\centering

\begin{tabular}{rlllr}
\hline\hline
    &  ($''$/yr)   & ~$\Delta_{100}$ &  ~$\Delta_{250}$ &Period (yr) \\ 
\hline
$g_1$ & \pam     5.59     &  0.13      & 0.20     &   231~843 \\
$g_2$ & \pam     7.452    &  0.019     & 0.023    &   173~913 \\
$g_3$ & \phm     17.368    &  0.20      & 0.20     &    74~620 \\
$g_4$ & \phm     17.916    &  0.20      & 0.20     &    72~338 \\
$g_5$ & \pam     4.257452 &  0.000030  & 0.000030 &   304~407 \\
$g_6$ & \phm     28.2450   &  0.0010    & 0.0010   &    45~884 \\
$g_7$ & \pam     3.087951 &  0.000034  & 0.000048 &   419~696  \\
$g_8$ & \pam     0.673021 &  0.000015  & 0.000021 &  1~925~646  \\
$g_9$ & \pa    ~$-$0.34994  &  0.00063   & 0.0012   &  3~703~492   \\
\hline
$s_1$ &\pa    ~$-$5.59       &   0.15       & 0.16        &    231~843 \\
$s_2$ &\pa    ~$-$7.05       &   0.19       & 0.25        &    183~830 \\
$s_3$ &      ~$-$18.850      &   0.066      & 0.11        &     68~753 \\
$s_4$ &      ~$-$17.755      &   0.064      & 0.14        &     72~994 \\
$s_5$ & \pam    0.00000013 &   0.0000001  & 0.0000001   &           \\
$s_6$ &      ~$-$26.347855   &   0.000076   & 0.000087    &     49~188 \\ 
$s_7$ & \pa   ~$-$2.9925259  &   0.000025   & 0.000025    &    433~079 \\
$s_8$ & \pa   ~$-$0.691736   &   0.000010   & 0.000011    &  1~873~547 \\
$s_9$ & \pa   ~$-$0.34998    &   0.00051    & 0.0011      &   3~703~069 \\ 
\hline
\end{tabular}
\llabel{tab.freqsec}
\end{table}