Non-Hispanic whites are a dwindling share of the U.S. population, with their numbers dropping in the Northeast and Midwest and growing only modestly in the South and West, the Census Bureau said Thursday. Whites declined in 15 states, almost all in the industrial and farming states from Massachusetts to Pennsylvania, and from Kansas to Ohio. They also declined in California and three Southern states, including Maryland. A Census Bureau analysis of the 2010 count showed that the number of non-Hispanic whites rose over the decade from 194.5 million to 197 million, but the 1.2 percent growth rate fell far short...