Getting really old!
Derived from the AgePickup-Graph, stating the pickup-ratio while aging:
0 - 15 years old : one picks up any change
15 - 40 : any dime but ignores pennies
40 - 75 : no single quarters but 2 quarters depending on how far they are seperate
< 90 : one always picks up silver dollars or dollar bills
> 115 : you won't even bother to pick up a hundred dollar bill