MIAMI - While the United States wrangles over immigration policy, Brazil has already made up its mind about immigrants. It wants more - as many as 6 million more.

They're needed, said Brazilian officials, to accelerate Brazil's development.

"In a globalized world, we need not only the flow of goods and services but also the flow of minds," said Brazil's Secretary of Strategic Affairs Ricardo Paes de Barros. "We're not after population; we're after talent and human capital. By opening society, we can accelerate the development process."

For a country that once prided itself on its immigrant past, Brazil now has one of the lowest rates of foreign-born citizens in the world.

"Brazil has become very, very closed to immigration," said Paes de Barros. "We used to pride ourselves as a nation made by immigrants. But that just isn't true anymore."

Brazil's "big migration" began in the late 19th century. Between 1888 and 1929 - excluding World War I - more than 100,000 immigrants arrived annually with Italians leading the way, followed by immigrants from Portugal, Spain, Germany, the Middle East, Poland, Russia and the Ukraine. At first they came to work Brazil's coffee plantations, but then they were needed on the factory floor as Brazil rapidly industrialized.

There also was brisk migration from Japan in the 1920s and 1930s. But after that, with the aim of preserving the Brazilian identity, immigration quotas were created and the torrents of new arrivals slowed to a trickle, except for a brief spurt after World War II.

A century ago, Paes de Barros said, 7.3 percent of the Brazilian population was foreign-born. Now that figure has dropped to just 0.3 percent. In contrast, the 2010 U.S. Census found that nearly 13 percent of the U.S. population was foreign-born.

"We want to get up to at least 2 percent - perhaps 3 percent," Paes de Barros said in a telephone interview from his office in Brasilia. With a current population estimated at 199 million, Brazil is potentially in the market for as many as 6 million immigrants.

"And it's OK if foreigners come temporarily and then want to go back to their home countries," Paes de Barros said. "We prefer to think of it as knowledge-sharing, not a brain drain."