What is wrong with those people who smoke cigarettes? If smoking tobacco relaxes one, then is it like a drug? The more you take it, the more you need it?
You may have a better source of figures for this, but here is a an excerpt from a report by the CDC outlining the top 5 preventable diseases that cause death in the U.S.
"The CDC released data naming the five leading causes of death among Americans under age 80 for 2014. After heart disease, cancer was the most likely cause of death. Rounding out the list were stroke; chronic lower respiratory diseases, such as asthma, bronchitis, and emphysema; and accidents. Nearly two-thirds (63%) of deaths in the United States were caused by these five diseases or conditions. Thirty percent of heart disease deaths, 15% of cancer deaths, 28% of stroke deaths, 36% of chronic lower respiratory disease deaths, and 43% of accident deaths were preventable, the CDC researchers said."
The question would be what percentage of heart attacks, respiratory disease, cancer, etc. are actually caused by smoking tobacco, since there are other contributing factors for all of these diseases. I have no idea, and I suspect it is pretty much impossible to sort that out. None of this to say that tobacco wasn't a major contributor, maybe even the primary in many cases.