Redshift evolution of the mean molecular gas fraction of MS galaxies. Circles show the mean molecular gas fraction from our work. Stars present the local reference taken from Saintonge et al. (2017). Lines display the analytical evolution of the molecular gas fraction inferred from our work. Symbols and lines are color-coded by stellar mass, i.e., pink for 10¹¹  ≤ M_⋆/M_⊙ < 10¹², orange for 10^10.5  ≤ M_⋆/M_⊙ < 10¹¹, and blue for 10¹⁰  ≤ M_⋆/M_⊙ < 10^10.5.