Of the 194.6 million persons 1 year old and over living in the United States in March 1968, 36.6 million, or 18.8 percent, had been living at a different address in March 1967, according to estimates from the Current Population Survey conducted by the Bureau of the Census. Of the 36.6 million person who had moved between March 1967 and March 1968, 23.0 million had moved within counties, 13.6 million had moved between counties--6.6 million within the same State, and 7.0 million between States. An additional 1.3 million had been living abroad in March 1967. The annual variation in the percentage of movers has been small. In the 21 annual surveys conducted since 1948, this percentage has ranged from 21.0 to 18.3.