\begin{table}%t1
%\centering
\par
\caption{Freeze-out values of free electrons, \HzI and \HDI at $z=100$.  \label{tab:freeze100}}
%\centering
\par
\begin{tabular}{cccc}
\hline\hline
Cosmology/Ref. & [\e/\HI] & $[\fHzI/\fHI]$ & $[{\rm \fHDI/\fHI}]$  \\ \hline
WMAP 3 + SDSS & $2.63\times10^{-4}$  & $4.23\times10^{-7}$ & $2.39\times10^{-10}$  \\
\citep{Puynew}  & $\sim$$10^{-4}$  & $1.5\times10^{-7}$  & $\sim$$2\times10^{-10}$ \\
\citep{Hirata} & --          & $\sim$$2\times10^{-8}$  &     --           \\
%\citep{SeagerFast}     & $2.64\times10^{-4}$  & -  &  -  \\
Analytic approx.   & $2.0\times10^{-4}$  & $2.9\times10^{-7}$  & $1.6\times10^{-10}$  \\ 
%CDM  & $4.54\times10^{-4}$  & $2.14\times10^{-6}$  & $8.1\times10^{-10}$   \\ 
\citep{Galli} & $\sim$$2.4\times10^{-4}$  & $\sim$$1\times10^{-7}$ & $8\times10^{-11}$  \\ \hline
\end{tabular} 
    \end{table}