\begin{table}%t1
\par
\caption{\label{rates}Sources observed (O), detected (D) and corresponding
detection rates (DR) of \METH\ masers, and \WAT\ 
maser at 22~GHz in {\it high} and {\it low} sources.}
%\centering
\par
\begin{tabular}{cccccccccccccc}
\hline \hline
\noalign{\smallskip}
        &  \multicolumn{3}{c}{6~GHz } &  \multicolumn{3}{c}{44~GHz } & \multicolumn{3}{c}{95~GHz } & \WAT\  & 44 GHz / 6 GHz & \WAT\ / 6 GHz & 44 GHz / \WAT\ \\
\cline{2-4} \cline{5-7} \cline{8-10}
        &  O  &  D  & DR  &  O  &  D  & DR  & O  &  D  & DR  \\
\hline
{\it high} & 147 & 39  & $27\pm 4 \%$  & 40 & 19 & $48 \pm 8 \%$  & 40  & 8 & $20\pm 6 \%$ & $28 \pm4\%$ & $1.8\pm0.6$ & $1.0\pm0.3$ & $1.8\pm0.5$  \\
%{\it High} & 21$\%$  & 49$ \%$  & $21 \%$  &  26$\%$ \\
{\it low}  &  149 & 16 & $11\pm 3 \%$ &  48 & 8 & $17\pm 5 \%$    & 48   & 3 & $6 \pm 3 \%$ & $9 \pm2 \%$ & $1.5\pm 0.8$ & $0.8\pm0.4$ & $1.9\pm1.0$   \\
\hline
total & 296 & 55 & $19\pm 2\%$ & 88 & 27 & $31\pm 5 \%$ & 88 & 11 & $13 \pm 4\%$  & & & & \\
\hline
{\it high}/{\it low} & & & $2.9\pm1.3$ & & & $2.5\pm1.1$ & & & $3.3\pm 1.4$ & $3.1\pm1.1$ & $1.2\pm1.0$ & $1.2\pm1.0$ & $0.9\pm0.7$  \\
\hline
\end{tabular}
\end{table}