The average smoker has 13 cigarettes a day, which is 364 cigarettes a month. This costs £141 a month, which is £1,696 a year.
Source: What happens when you quit? @ NHS Smokefree
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Image by Challiyil Eswaramangalath Vipin from Chalakudy, India (cigarette.. like a cigarette in the rain) [CC-BY-SA-2.0], via Wikimedia Commons