And the number is probably even higher today. More and more people quit smoking, since it is no longer socially acceptable. Currently only 20% of US adults smoke, down from about 50% in the 50s and 60s.
People who have mental illnesses smoke at a rate of 50 to 80 percent, compared with less than 20 percent of the general population. These high-risk people also smoke many more cigarettes a day than a regular smoker -- often three packs. Furthermore, smokers with mental illness are much more likely to smoke their cigarettes right down to the filters.