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The proportion of 11 to 16-year-olds who smoke has fallen from 6.9 per cent to 3.4 per cent since tax on tobacco was put up in 2009, the University of Hong Kong study found.
The fall is the equivalent of 13,452 adolescents who would have become smokers were it not for the 50-per-cent tobacco duty rise, the university's School of Public Health said.