Fig. 2From: Outpatient physical therapy population has been aging faster than the general population: a total population register-based studyYearly changes from 1999 to 2015 associated with older adults using outpatient physical therapy. Legend. The yearly changes from 1999 to 2015 in: a the absolute number of older adults who used outpatient physical therapy (OPT), b the percentage of older adults in the OPT client population (all ages), and c the percentage of the general older sub-population (≥ 65 years) who used OPTBack to article page