In 1870, women accounted for only 15 percent of the workforce in the United States outside the home. By 1950, after two world wars and the Great Depression, this figure had risen to 30 percent (it had been even higher temporarily during World War II because of high levels of war-mandated production) and by 2008, to 48 percent. Based on economic reasoning, identify four industries that should have benefited from the social change that saw women shift from their most frequent historical roles in Western society as full-time homemakers to becoming more frequently full-time participants in the workforce.