Fig. 2From: Incidence, casualties and risk characteristics of civilian explosion blast injury in China: 2000—2017 data from the state Administration of Work SafetyAnalysis of different grades of explosion accidents by region. Grade of explosion was categorized by number of deaths into ordinary (n < 3), serious (3 ≤ n < 10), major (10 ≤ n < 30) or extraordinarily major (n > 30)Back to article page