Would be nice to see if this number dipped from before. International students typically end up paying out of station tuition and is a huge source of income for the univs.
This is not true for PhD programs in top-ranked institutions. It may have been true 20+ years ago, but today it is very difficult to buy your way into a graduate program.
That is much less true of grad programs in technical fields. Undergrad, international students are indeed more likely to pay full-boat--or at least larger boat--than US applicants.