Fig. 3From: Systemic overuse of health care in a commercially insured US population, 2010–2015Region-specific changes in the Johns Hopkins Overuse Index from 2011 to 2015. Each region’s trajectory over time is a horizontal layer. The simultaneous plotting of trajectories results in a stacking of layers. Shading is used to represent the 5 JHOI quintiles. The JHOI quintile from the first half of 2011 fixes the vertical position of each regionBack to article page