We spend about eight hours per day, hours per week 56 240 hours per month, and 2,920 hours per year (one-third of our lives) In the study of sleep about sleep have shown that there are more than 70 million people in the United States that insufficient sleep, cause a loss of approximately $100,000 per year from the accident. Hospitals and work (statistics from the Society for Neuroscience, Brain Facts, 2002).
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