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Annual cessation rates for U.S. smokers from 1991 to 2010. Top panel is for smokers of all ethnicities, and bottom panel is for smokers who are non-Hispanic White. Data are from the National Health Interview Survey. Responses from proxies are not included. The 1992 data were adjusted by imputation to account for missing values caused by skip pattern errors. Results were weighted to be representative of the national population of adults aged 18 years and older in each survey year.
