Time evolution of the ratio of the local P1 binary incidence to the local P2 binary incidence in four radial regions; within 0.5 projected half-light radii, within 1 projected half-light radius, between 2 and 3 projected half-light radii, and between 3 and 5 projected half-light radii, from top to bottom respectively. Incidence refers to the fraction of objects within each population that are binaries (see Eq. (3)).