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 ignore pennies
40 - 75 : no single quarters but two quarters depending on how far they are seperate
< 90 : always pick up silver dollar or dollar bill
> 115 : you won't even bother to pick up a hundred dollar bill