After the revolution, the composition of the middle class did not change significantly, but its size doubled from about 15 percent of the population in 1979 to more than 32 percent in 2000. Several prerevolutionary social groups still were identifiable, including entrepreneurs, bazaar merchants, physicians, engineers, university teachers, managers of private and public concerns, civil servants, teachers, medium-scale landowners, junior military officers, and the middle ranks of the Shia clergy. New groups also emerged, including technicians in specialized fields such as communications, computers, electronics, and medical services; owners of small-scale factories employing fewer than 50 workers; owners of construction firms and transport companies; and professional staff of broadcast and print media. Merchants, especially those with ties to bazaar-based organizations even though their stores were physically located outside the traditional covered bazaars, gained access to political power that they had lacked before the Revolution.