I’m not sure what happened there. I don’t think Yemen’s GDP data was carried over correctly.

Edit:

So it turns out that Yemen’s GDP data was incorrect, and somehow it’s the same as Vietnam’s gdp data.

However, even when accounting for that, it would only push it past down Paraguay. This is because this chart uses Investor-State Dispute Settlement cases as data. So, for countries where the state is complicit in exploitation and is aligned with the interests of the exploiters, there won’t be many cases. (Which also explains why there is a revolution in Yemen at the moment.)

But in these instances, there won’t be many cases where the country is hosting an investor state either.