Of the country's 30 million foreign-born residents, only one in four is white.

About 99 percent of the country's foreign-born residents were white in 1940, compared with just 25 percent now.

Their numbers increased so much that they now represent the largest groups of foreign-born residents in this country.

As recently as 1990, the figure for foreign-born residents was 28 percent.

They found disproportionate numbers of white, Asian and foreign-born residents.

In 2003, foreign-born residents made up 11.7 percent of the population, the highest percentage since 1910.

The number of foreign-born residents increased by 34,000 between 1990 and 2000.

Mexico accounted for more than a quarter of all the foreign-born residents.

The previous record was in 1944, when 441,979 foreign-born residents became American citizens.

The study found that, on average, foreign-born residents were much more likely than native Americans to live in or around a handful of big cities.