Mumbai is the commercial and financial capital of India, contributing 33% of all income tax and 60% of all customs duty from trade. It is home to the Indian stock market, the busiest port and airports in India, and many specialised technical industries. The rapidly growing population has created demand for goods and services, and 25% of India's industrial production is in Mumbai. The port area also creates a lot of valuable jobs. Mumbai has the headquarters of many Indian financial institutions and companies