19% = the number of overweight people who would risk death to be thin.

33% = the number of obese people who would risk their life to lose 10 pounds.

4% = the number of normal-weight people who would take that risk to shed 10 pounds.

31% = the number of obese people who would trade up to 5% of their remaining years to be 10% thinner.

Source: January 4, 2005, issue of The New York Times.