Persons moving from metropolitan areas exceeded immigrants from nonmetropolitan areas in the period 1970-74, according to estimates from the Current Population Survey. In the period March 1970 to March 1974, the survey data indicate that 5,965,000 persons 4 years old and over moved out to metropolitan areas of the United States and 4,121,000 moved into metropolitan areas, resulting in a net migration loss from metropolitan to nonmetropolitan areas of 1,844,000.