In particular, read the Notes section next to the US. Our immigration rate, if you counted it the same way, is about the same as Australia. But comparing US immigration to Australia immigration is apples to oranges. Australia has quite strict regulations on who it accepts as immigrants, and doesn't even accept a single refugee. Meanwhile the US has an illegal immigration population that dwarfs the legal one, we basically don't have a Southern border.
In particular, read the Notes section next to the US. Our immigration rate, if you counted it the same way, is about the same as Australia. But comparing US immigration to Australia immigration is apples to oranges. Australia has quite strict regulations on who it accepts as immigrants, and doesn't even accept a single refugee. Meanwhile the US has an illegal immigration population that dwarfs the legal one, we basically don't have a Southern border.