Whooping cough is the common name for the disease pertussis. The graph below shows the number of cases of whooping cough that occurred in Sydney, Australia, during the first half of 2005. Based on the evidence in the graph, which of these groups had the highest rate of whooping cough?

Group of answer choices

age group 0–4

age group 45–49

age group 30–34

age group 35–39