\begin{table}%T1
%\centering
\par
\caption{The calculated optical depth as a function of redshift
for\protect different values of $\Omega_{\rm L}$ and $\Omega_0=0.3$.}
\label{tabl1}
\begin{tabular}{cccc}
\hline\hline
$z\backslash\Omega_{\rm L}$ & 0.01 & 0.05 & 0.10 \\
\hline
0.5 & 0.001100 & 0.005499 & 0.010998 \\
1.0 & 0.004793 & 0.023967 & 0.047934 \\
1.5 & 0.010310 & 0.051550 & 0.103100 \\
2.0 & 0.016196 & 0.080980 & 0.161959 \\
2.5 & 0.021667 & 0.108334 & 0.216669 \\
3.0 & 0.026518 & 0.132590 & 0.265180 \\
3.5 & 0.030770 & 0.153852 & 0.307703 \\
4.0 & 0.034504 & 0.172521 & 0.345042 \\
4.5 & 0.037804 & 0.189018 & 0.378037 \\
5.0 & 0.040742 & 0.203712 & 0.407424 \\
\hline
\end{tabular}
\end{table}