\begin{table}%t3
\caption{\label{exp_conditions}Calculated cages occupancy equilibrium.}
%\centerline
{
\small\begin{tabular}{c c c c c}
\hline\hline\noalign{\smallskip}
CH$_4$		& Temperature$^a$    	& Pressure\tablefootmark{a} & Obs. \tablefootmark{b} &Pred.\tablefootmark{b}\\
(mol. ratio \%)					&(K)    			& (Bar) &  L/S                 &L/S\\
\hline
5		& 250   	& 40	&$0.46\pm 0.2$   &0.45\\
15		& 255  	& 50	&$0.9\pm 0.16$    &0.86\\
50		& 240   	& 60	&$1.61\pm 0.29$   &1.78\\
100		& 255  	& 40	&3.00   &3.00\\
\hline
\end{tabular}}
\tablefoot{
\tablefoottext{a}{Formation conditions;}
\tablefoottext{b}{assuming and normalised to ${\rm L/S} = 3$ for the 100\% methane clathrate hydrate}}
\end{table}