\begin{table}%t3
%\centering
\par
%
\par
\caption{\label{tbl:source_types}Summary of number of sources observed, maser detections and detections rates by source classification.}
\begin{tabular}{lccc}
\hline
\hline
Source type	& \# of Obs. & \# of Association	& Detection rate \\
\par
\hline
\par
YSOs		&	232	&	60	&	$\sim$$26\pm 4$\%		\\
HII/YSOs	&	104	&	34	&		$\sim$$32\pm 5$\%	\\
Young/Old	&	40	&	7	&	$\sim$$18\pm 7 $\%	\\
HII regions	&	123	&	34	&	$\sim$$28\pm 4 $\%	\\
\par
\hline
\end{tabular}%\vspace*{-3mm}
\end{table}