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.
Calculating the Average Life on a Bond. For example, assume an annual-paying four-year bond has a face value of $200 and principal payments of $80 during the first year, $60 for the second year, $40 during the third year and $20 for the fourth (and final) year.