Amount of calories in the average three-inch diameter bagel 20 years ago:

140

Amount of calories in the average six-inch diameter bagel today: 350

Amount of calories in the average fast-food cheeseburger 20 years ago: 333

Amount of calories in the average fast-food cheeseburger today: 590

Percentage of American teens aged 13 to 17 who say they have tried

marijuana: 10

Percentage of American teens aged 13 to 17 who say they have tried marijuana

who also have a boyfriend or girlfriend: 22

Sources: National Institutes of Health, The Gallup Organization