Coins disappear from circulation at an alarming rate, especially those worth the least.
Within two years, 70% of all pennies made today will have disappeared into drawers, piggy banks, or sofas.
As the value rises, the disappearance rate goes down: only 14% of nickels, 10% of dimes, and 8% of quarters drop out in the same period of time.
Ironically, the lower the denomination, the higher the proportionate cost to replace them.
Pennies cost about half a cent to manufacture; nickels, about two and a half cents; dimes only a penny; quarters, three cents; and fifty-cent pieces, five cents.