Yes, how rich the Dubai city?
The Wikipedia describes:
Revenues from petroleum and natural gas contribute less than 6% (2006) of Dubai’s US$ 37 billion economy (2005). A majority of the emirate’s revenues are from the Jebel Ali free zone authority (JAFZA) and, increasingly, from tourism and other service-oriented businesses. Dubai has attracted world-wide attention through innovative real estate projects and sports events.