How much of the worlds population smokes?

Answer 1

As of 2002, Approximately 5.5 trillion cigarettes are produced globally each year and are smoked by over 1.1 billion people or greater than one-sixth of the world population

Answer 2

In the United States, an estimated 24.8 million men (23.1 percent) and 21.1 million women (18.3 percent) are smokers.