I totally agree with you that the US is very self contained compared to many countries, though I wonder if that would also be true of the EU as a bloc. The gra

I totally agree with you that the US is very self contained compared to many countries, though I wonder if that would also be true of the EU as a bloc. The graph you posted treats the US as one unit but each EU country as a separate unit. I think it EU/US or EU country/US state would be more comparable.