I have not figured that number. They are like growing sunflower seeds in red winter wheat country, a junk crop.
Sometimes theres so many I have to tune them out as too distracting.
Whenever I have a new hunting partner, or a regular, I try and show her what were looking for, fire rock and than lithic color, a few catch on but when they get board or just dont ever get it,
I sick them after tabs.
Than after I have a few to show and can encourage them along, in this fun way, they have been know to pick up dozens upon dozens of dozens.