Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
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No president of the United States was an only child for his parents.
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In Kentucky, US, every citizen is required by law to take a bath at least once a year.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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