Distributions of the molecular-gas-to-stellar-mass ratio μ_gas, the gas fraction f_gas, and the depletion time t_depl for the PHIBSS2 z = 0.5 − 0.8 sample, whose medians are , and with respective dispersions of 0.42, 0.33, and 0.23 dex. The corresponding distributions of the total, non-mass-matched z ∼ 0 COLDGASS survey (dashed lines; Saintonge et al. 2011a, 2011b), and of the z = 1.2 − 2.2 PHIBSS survey (dotted lines; Tacconi et al. 2010, 2013) are indicated for comparison. The medians are respectively 0.10, 0.09, and 1.42 Gyr for the COLDGASS survey and 0.96, 0.49, and 0.67 Gyr for the PHIBSS survey. Typical Poisson errors are shown at the positions of the medians for the different surveys.