Mass accretion rates normalized by stellar mass squared at cluster ages of individual star forming regions. The mass accretion rate Ṁ of each star has been divided by and combined by the median for each cluster. Ṁ is given in units of M_⊙/ yr and the stellar mass M_∗ is given in units of M_⊙. Stars in the η Cha association are shown as filled black square. The other clusters are shown as a cyan inverted triangle for ρ Ophiucus, as a red circle for Lupus, as a green triangle for Chamaeleon I, and as a blue star for σ Orionis. The error bars indicate the standard deviation in logarithmic scale of the normalized mass accretion rates.