Dubai’s gross domestic product is US $83.4 billion. Although Dubai’s economy was built on the back of the oil industry, revenues from oil and natural gas currently account for less than 7% of the emirate’s revenues. It is estimated that Dubai produces 50,000 to 70,000 barrels (11,000 m3) of oil a day and substantial quantities of gas from offshore fields. The emirate’s share in UAE’s gas revenues is about 2%. Dubai’s oil reserves have diminished significantly and are expected to be exhausted in 20 years. Real estate and construction (22.6%), trade (16%), entrepôt (15%) and financial services (11%) are the largest contributors to Dubai’s economy. Dubai’s top exporting destinations include India (US$ 5.8 billion), Switzerland (US$ 2.37 billion) and Saudi Arabia (US$ 0.57 billion). The emirate’s top import sources are India (US$ 12.55 billion), China (US$ 11.52 billion) and the United States (US$ 7.57 billion). India is Dubai’s largest trade partner.