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.
Visual Economics has a fun chart that shows how many of each denomination of U.S. currency is in circulation, as well as their average lifespans. For some reason, the $5 bill has the shortest lifespan. Also, seriously, we need to stop producing pennies NOW. âThe Value of United States Currency in Circulationâ [Visual Economics]