The white populations of the District, Arlington and Alexandria have grown this decade even as the region's outer counties have grown more diverse, according to new census estimates to be released today that underscore how the area's soaring housing prices and job sprawl are reshaping its racial and ethnic dynamics. The city and those close-in Virginia suburbs had higher percentages of non-Hispanic white residents in 2004 than in 2000, a reversal of past trends, the estimates say. Minority groups grew more slowly than in the past, or declined. In the District, Arlington and Alexandria, whites became a larger share of...