\begin{table}%t7
\caption{\label{tab:abundc}Relative abundances $n_{\xi} / n_{{\rm b}}$ of carbon species at redshifts $z=1000$, $z=100$ and $z=10$ in the SBBC (left), NSBBC1 (middle) and NSBBC2 (right) models.}
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\par
\begin{tabular}{l l l l l l l l l l}
\hline
\hline
& & SBBC & & & NSBBC1 & & & NSBBC2 &\\
\hline
Species & $z=1000$ & $z=100$ & $z=10$ & $z=1000$ & $z=100$ & $z=10$ & $z=1000$ & $z=100$ & $z=10$\\
\hline
$[{\rm C}]$ & $7.9 \times 10^{-16}$ & $2.4 \times 10^{-15}$ & $2.4 \times 10^{-15}$ & $1.3 \times 10^{-15}$ & $3.8 \times 10^{-15}$ & $3.8 \times 10^{-15}$ & $2.7 \times 10^{-14}$ & $8.0 \times 10^{-14}$ & $8.1 \times 10^{-14}$\\
$[{\rm C}^+]$ & $1.7 \times 10^{-15}$ & $1.4 \times 10^{-16}$ & $1.1 \times 10^{-16}$ & $2.7 \times 10^{-15}$ & $2.3 \times 10^{-16}$ & $1.7 \times 10^{-16}$ & $5.7 \times 10^{-14}$ & $4.8 \times 10^{-15}$ & $3.7 \times 10^{-15}$\\
$[{\rm C}^-]$ & $7.6 \times 10^{-35}$ & $1.1 \times 10^{-24}$ & $6.7 \times 10^{-25}$ & $1.2 \times 10^{-34}$ & $1.8 \times 10^{-24}$ & $1.1 \times 10^{-24}$ & $2.6 \times 10^{-33}$ & $3.9 \times 10^{-23}$ & $2.3 \times 10^{-23}$\\
$[{\rm CH}]$ & $1.2 \times 10^{-22}$ & $1.2 \times 10^{-21}$ & $6.2 \times 10^{-21}$ & $2.0 \times 10^{-22}$ & $2.0 \times 10^{-21}$ & $9.8 \times 10^{-21}$ & $4.2 \times 10^{-21}$ & $4.2 \times 10^{-20}$ & $2.1 \times 10^{-19}$\\
$[{\rm CH}^+]$ & $3.7 \times 10^{-23}$ & $3.4 \times 10^{-24}$ & $3.1 \times 10^{-24}$ & $5.8 \times 10^{-23}$ & $5.5 \times 10^{-24}$ & $5.0 \times 10^{-24}$ & $1.2 \times 10^{-21}$ & $1.2 \times 10^{-22}$ & $1.1 \times 10^{-22}$\\
$[{\rm CH}_2]$ & $7.9 \times 10^{-35}$ & $6.9 \times 10^{-29}$ & $1.1 \times 10^{-28}$ & $1.3 \times 10^{-34}$ & $1.1 \times 10^{-28}$ & $1.7 \times 10^{-28}$ & $2.8 \times 10^{-33}$ & $2.3 \times 10^{-27}$ & $3.7 \times 10^{-27}$\\
$[{\rm CH}_2^+]$ & $2.7 \times 10^{-34}$ & $1.5 \times 10^{-28}$ & $4.5 \times 10^{-29}$ & $4.3 \times 10^{-34}$ & $2.5 \times 10^{-28}$ & $7.2 \times 10^{-29}$ & $9.2 \times 10^{-33}$ & $5.2 \times 10^{-27}$ & $1.5 \times 10^{-27}$\\
\hline
\end{tabular}
\end{table}