More gold around than silver?

Hello, I am new so sorry if this has question has been posed already. Regarding the amount of gold above ground, I read somewhere (maybe David Morgan) that it's about enough to fill 3 olympic-sized swimming pools. For silver, it's maybe about half that amount primarily because so much of it has been discarded in landfills. Not sure how many tons/ounces this translates to. Is there good data available or are these to be considered wild estimates? Thanks,