The indicator also provides information on the success of measures to fight major diseases. For that purpose, especially over a longer horizon, measuring death rates of major diseases is also important. It is calculated from the responses to individual or household surveys that are nationally representative. Tobacco is an undisputable health threat causing 5.4 million deaths in 2005, and representing the second risk factor for mortality worldwide. Tobacco consumption is costly and contributes to poverty and associated health inequalities at the individual and national levels. The cost of treatment of tobacco-caused diseases is high and falls heavily on the finances of poor households and countries.