According to the International Study of Asthma and Allergies in Childhood (ISAAC): 11,3% in 2007
Reference: Foliaki, S. et al. 2007. Prevalence of Symptoms of Childhood Asthma, Allergic Rhinoconjunctivitis and Eczema in the Pacific: The International Study of Asthma and Allergies in Childhood (ISAAC). Allergy, 62 (3): 259-64.