\begin{table}
   \caption{Fitting coefficients of CO-para-H$_2$ rates, following
  formula~\ref{fitrates}. I and F are the initial and final
  rotation states, respectively. The rates thus obtained are in
  cm$^3$~s$^{-1}$.}%\centering
\par
  \begin{tabular}{ccccccc}
 \hline \hline   I & F & $a_0$ & $a_1$ & $a_2$ & $a_3$ & $a_4$ \\
    \hline
    1 & 0 & $-$10.413 & 4.162 & $-$20.599 & 32.563 & $-$16.889 \\
    2 & 0 & $-$9.202 & $-$7.997 & 18.452 & $-$18.717 & 6.910 \\
    2 & 1 & $-$0.379 & $-$59.429 & 131.662 & $-$127.161 & 45.605 \\
    \hline
    3 & 0 & $-$3.319 & $-$35.329 & 53.745 & $-$29.641 & 2.471 \\
    3 & 1 & $-$7.042 & $-$20.755 & 48.788 & $-$49.875 & 18.607 \\
    3 & 2 & $-$1.976 & $-$48.986 & 107.139 & $-$102.134 & 36.288 \\
    \hline
    4 & 0 & $-$8.004 & $-$16.164 & 28.359 & $-$21.986 & 6.026 \\
    4 & 1 & 1.979 & $-$69.801 & 140.821 & $-$125.047 & 40.556 \\
    4 & 2 & $-$5.102 & $-$34.014 & 82.717 & $-$87.211 & 33.665 \\
    \hline
    4 & 3 & $-$1.891 & $-$49.861 & 109.419 & $-$103.434 & 35.726 \\
    5 & 0 & 7.564 & $-$106.151 & 220.187 & $-$205.770 & 72.462 \\
    5 & 1 & $-$5.209 & $-$32.541 & 67.718 & $-$63.996 & 23.105 \\
    \hline
    5 & 2 & 4.736 & $-$91.653 & 203.779 & $-$201.295 & 73.681 \\
    5 & 3 & $-$5.607 & $-$31.380 & 78.077 & $-$83.702 & 32.930 \\
    5 & 4 & $-$0.510 & $-$60.401 & 137.793 & $-$134.344 & 46.449 \\
    \hline
  \end{tabular}
\end{table}