96% of homes in the United States have one of these. What is it?

In 1974 there were over 50,000 of these in the U.S., now there are hardly any. What are they?

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Almost 5000 people each year go to the emergency room after being injured by this. What is it?

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In it's 51 year history, this only happened once on Wheel Of Fortune. What is it?

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20% of people find this sound to be annoying. Others think it's soothing. What is it?

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90% of people who try to do this are successful. What is it?

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