Fig. 3From: Revisiting the epidemiology of pertussis in Canada, 1924–2015: a literature review, evidence synthesis, and modeling studyYearly adjusted age-stratified incidence rates for combined age-supplied reported cases and proportionally-distributed “Unknown” group \( \overset{\sim }{\ {\boldsymbol{R}}_{\boldsymbol{j}}} \), also calculated via the bootstrapping method. Note that some of the groupings changed during the years of reporting; these changes are denoted by gaps in the graphBack to article page