Remember when Donald Trump was worried about our trade deficit? Yeah, that must have been days ago.

But anyhow, as I and others have pointed out, the tuition and other expenses that foreign students pay to study at places like Harvard is a major source of foreign exchange earnings. Last year, we got more than $56 billion in revenue from these students.

However, foreign students are not just a large current source of earnings; they have been a rapidly growing source. Here’s the picture since 2000.

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