<Tr> <Td> Services </Td> <Td> 65.52% </Td> </Tr> <P> Construction, also an important activity, provides a significant source of employment for large numbers of unskilled workers and is buoyed by the number of seasonal residents who build second homes in the Greater Rio area . </P> <P> To attract industry, the state government has designated certain areas on the outskirts of the city as industrial districts where infrastructure is provided and land sales are made under special conditions . Oil and natural gas from fields off the northern coast of Rio de Janeiro state are a major asset used for developing manufacturing activities in Rio's metropolitan area, enabling it to compete with other major cities for new investment in industry . </P> <P> Having been the capital for more than 300 years, the city of Rio de Janeiro is the site for the headquarters of many private, national, multinational, and state corporations, even when their factories were located in other cities or states . Despite the transfer of the capital to Brasília, many of these headquarters remained within the Rio metropolitan area, including those of Petrobrás, the state oil company, and the National Economic and Social Development Bank, a federal investment bank . As with manufacturing, Rio is an important financial center, second only to São Paulo in volume of business in financial markets and in banking . Its securities market, although declining in significance relative to São Paulo, is still of major importance . Owing to the proximity of Rio's port facilities, many of Brazil's export - import companies are headquartered in the city . </P>

Which sector provides the most jobs in rio