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.
Weighted average life = $91,000 / $23,000 = 3.96 years. The largest payment is the final payment, so the WAL is close to the total five-year term of the bond. If, for example, the year two and year five payments were switched, the weighted average life would be much lower: Year 1 = 1 x $1,000 = $1,000. Year 2 = 2 x $10,000 = $20,000