Chicago, the third-largest U.S. city, lost 17% of its black population - 181,000 people - in the past decade, according to the Census Bureau

In their place, Hispanics gained 25,000, or 3.3%. In the city that drew waves of blacks during the Great Migration of the early 20th century, their descendants barely remain the largest racial or ethnic group, at 32.4%. Blacks earn less and are more likely to live in poverty than Hispanics, who make up almost 30% of Chicago, a city of 2.7 million that lost 6.9% of its population since 2000. The reversal of fortunes for the two groups is echoed nationwide, where blacks have fallen to 12.6% of the total U.S. population of 308.7 million, and Hispanics have risen to 16.3%. Hispanics are also outpacing blacks economically: their median household income rose 21.6% in the decade to $40,946, compared with $34,445 for blacks. This shouldn't be too surprising since Hispanics have higher IQ's than blacks.