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Insomnia and Laughter

Leadership, Fall, 1993, p. 129

Number of times a child laughs each day, on average:

400

Number of times an adult laughs each day, on overage:

15

Number of Americans with stress-related insomnia:

1 in 5

Number on any given day who need more sleep;

45 million

Percentage decrease in average sleep time, since 1900:

20