Extended from Fig. 7 of Aravena et al. (2016b): molecular gas depletion time of our lensed SMGs (black circles), SPT lensed SMGs (green diamonds), and other unlensed SMGs (orange stars). The ranges of local ULIRGs (Solomon et al. 1997) and z = 0.6–1 ULIRGs (Combes et al. 2013) are also included as the red and purple regions, respectively. The cyan region indicates the main sequence galaxies as described by Saintonge et al. (2013) through the formula t_dep = 1.5(1 + z)^α, in which α is from α = −1.5 (Davé et al. 2012) to α = −1.0 (Magnelli et al. 2013).