The manufacturing sector is one of the top employers in the city of Seoul. However, the service sector employs the largest proportion of the city’s workforce. Major employers include the many multinational and trade corporations whose headquarters are in Seoul, financial and insurance companies, and professional and business service firms. Seoul is also the center of finance for the country. The headquarters of the major stock exchanges and banks are located in the northern and southern districts and on Youi Island. Seoul also hosts many annual trade shows. Food processing, beverage production, and publishing and printing are also important to Seoul.