But I think of it like trying to estimate the size of an iceberg by observing the tip. Just because you know a little bit doesn’t mean you actually know about the scale. And there’s every reason to believe it’s quite extensive given how easily money flows from corrupt countries through USD and US persons and companies (eg the major bank that’s constantly getting fined for laundering terrorist and drug cartel money - either they’re the only ones and they’re making a killing providing this service anyway or they’re the only ones anyone is bothering to investigate, but that business is clearly lucrative to continue to engage in).