\begin{table}%T9
%\centering
\small
\caption{Observed phase shifts and amplitude ratios.\label{t9}}
\begin{tabular}{crrrrrr}  \hline\hline
Frequency & $u-y$ & $v-y$ & $b-y$ & $u/y$ & $v/y$ & $b/y$ \\
(cd$^{-1}$)&($^{\circ}$)~ & ($^{\circ}$)~ & ($^{\circ}$)~ & ~&~&~\\ \hline
$f_1=2.1066$ &$-$11.4 &  $-$4.3 &  $-$4.6 &0.85 &1.37 &1.22 \\
~            &    5.7 &     4.6 &     4.5 &   7 &   9 &   8 \\
$f_2=1.8694$ &    0.8 &  $-$5.6 &  $-$2.6 &0.93 &1.39 &1.27 \\
~            &    6.7 &     5.7 &     5.5 &   8 &  10 &   9 \\ 
$f_3=2.2124$ &   15.3 &     8.3 &     7.6 &1.00 &1.57 &1.40 \\
~            &    9.1 &     7.7 &     7.5 &  12 &  16 &  14 \\ 
\hline
\end{tabular}
\end{table}