What percent of people are able to stop smoking for more than one year?

Most people who are really determined manage to quit, but often only after several attempts. That makes the statistics difficult to gather and evaluate.

In addition to the above, statistics extrapolated from the decline in cigarette sales are subject to question, because many people are now purchasing black market smokes, online or imported, to avoid the higher prices, and Indian sales have skyrocketed as well. Since the government gets its figures from decreases in taxed sales, those numbers are suspect.

Some sources hold that the number of smokers has not decreased much, but that they have just gone underground with their purchases.