1 Research shows youâre around 400% more likely to have too much iron than not enough â and this can pose serious risks to your health. 2  In one study of more than 1,000 people, only 3 percent were iron deficient, but 13 percent had iron overload.
According the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.ccording the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.
This study concerned the average lifespan of coins and, more specifically, how much the United States government would save if our nation replaced the dollar bill with a dollar coin. The average dollar coin would stay in circulation for 30 years. The dollar bill would stay in circulation a mere 18 months.