Love It or Leave It?

In America Still Beckons, Joel Kotkin writes,

Europe may be a great place to visit, but U.S. emigration to the continent is paltry—while the reverse flow from Europe to the United States remains at consistently high levels even with the somewhat bothersome screenings imposed after 9/11. While Europeans are no longer the primary immigrants to the U.S. (that role having been taken over by Latin Americans and Asians), they remain an important factor in the continuing re-invention of America.

I wonder what the stats are.

Update. This is all I could find. Like a lot of topics, the more one looks, the more complicated things get.