\begin{table}%t1
%\centering
\par
\caption{\label{t:1}Initial compositions used for the model calculations.}
\small \begin{tabular}{ccccccccccc}
\hline\hline
Metallicity & \multicolumn{2}{c}{Super-solar}
& \multicolumn{2}{c}{Solar} & \multicolumn{2}{c}{LMC} & \multicolumn{2}{c}{SMC} & \multicolumn{2}{c}{Metal poor} \\
\hline
$Z$ & \multicolumn{2}{c}{0.04} & \multicolumn{2}{c}{0.02}
& \multicolumn{2}{c}{0.008} & \multicolumn{2}{c}{0.004} 
& \multicolumn{2}{c}{0.0005} \\
$X$ & \multicolumn{2}{c}{0.635} & \multicolumn{2}{c}{0.695}
& \multicolumn{2}{c}{0.731} & \multicolumn{2}{c}{0.743} 
& \multicolumn{2}{c}{0.7535} \\
$Y$ & \multicolumn{2}{c}{0.325} & \multicolumn{2}{c}{0.285}
& \multicolumn{2}{c}{0.261} & \multicolumn{2}{c}{0.253} 
& \multicolumn{2}{c}{0.2460} \\
\hline
Met. scaling & Sol. & $\alpha$-enh. & Sol. & $\alpha$-enh.
& Sol. & $\alpha$-enh. & Sol. & $\alpha$-enh. 
& Sol. & $\alpha$-enh. \\
\hline
mixture & I & II & III & IV & V & VI & VII & VIII & IX & X \\
\hline
\end{tabular}
\end{table}