Here's a pretty good source.
http://www.cdc.gov/chronicdisease/resources/publications/aag/osh.htm
Here's an interesting thought. Health Care reform could possibly be paid for by the prohibition of cigarettes. Even after the loss of tax revenue savings would in in the neighborhood of 200 billion dollars annually from medical costs related to smoking and lost productivity. It makes you winder how much of the nearly 100 billion in the medical cost caused by cigarette smoking annually do we and our employers pay through our health insurance premiums? I would imagine most of it. I really makes you wonder what an impact such a prohibition would have?
BTW, Obesity is #2 preventable cause of death, that and tobacco cause more preventable deaths then all other recorded causes combined.