We sort 4683 molecular clouds between 10{deg}75% of clumps with known distance being gravitationally bound ({alpha}10^3^M_{sun}) starless clumps to be 0.37+/-0.08Myr (M/10^3^M{sun})^-1^; the majority (M<450M{sun}_) have phase lifetimes longer than their average freefall time.
Cone search capability for table J/ApJ/822/59/table1 (Observed H2O maser properties (updated version for positions in June 2018))
Cone search capability for table J/ApJ/822/59/table2 (Observed NH3 properties (updated version for positions in June 2018))
Cone search capability for table J/ApJ/822/59/clumps (Observed 1.1mm data, star formation indicator flags and physical properties of the molecular cloud clumps (tables 3, 5 and 6))