I see you linked to the Wikipedia page for your assertion that "Between 1975 and 1980 and additional 120,000 Vietnamese were in the US" ... "likely attributable to intake of refugees". In other words, you have no support for your assumption that they were refugees, and thus no support for your naked assertion that the US accepted 823,000 refugees. Of course you're also relying on numbers that are at least five years old. It's a shame that, as usual, you overplayed your hand. I'm willing to concede that close to half (mas o menos) of the Vietnamese are refugees. I take my hat off to the Wikipedia expert on Vietnamese immigration.