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Northeast. Midwest. South. Supplementary Figure 1 . Trends in cigarette affordability (RIP) a , US census regions, 1970-2008 a Percent of per capita personal disposable income required to buy 100 packs of cigarettes.
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Northeast Midwest South Supplementary Figure 1. Trends in cigarette affordability (RIP)a, US census regions, 1970-2008 aPercentof per capita personal disposable income required to buy 100 packs of cigarettes