The economically active Brazilian labor force is estimated to include about 55.4 million persons; women make up about one-third of the labor force. About 26 percent of the workers are engaged in agriculture, about 51 percent are employed in services, and some 23 percent labor in manufacturing and construction. Many of the workers are members of unions belonging to one of several national confederations; the groupings include the National Confederation of Industrial Workers, the National Confederation of Agricultural Workers, and the National Confederation Communications and Advertising Workers, all located in Brasília.