In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. Upon ascertainment of all lung cancer deaths, the investigator obtained the following data:

	Number of Individuals	Lung Cancer Deaths
Smokers	24,500	15
Nonsmokers	10,500	2

Calculate thepopulation risk difference per 100,000 per year. Round to the tenth decimal.

Calculate the risk difference per 100,000 per year. Round to the tenth decimal.