Fraction of the world's smokers who live in China: 1/3

Percentage of Chinese men who smoke regularly: 49

Percentage of Chinese women who smoke regularly: 3

Percentage of Americans who think it is not the federal government's responsibility to make sure everybody has health care coverage: 34

Average percentage increase in cases of malignant melanoma annually since 1981: 3

Age range for which melanoma is the most common cancer: 25 - 29

Sources: World Health Organization, The Gallup Organization, Centers for Disease Control and Prevention

Compiled by Eugenie Kim