Abu Dhabi's Emirate is the wealthiest of the UAE in terms of Gross domestic product (GDP) and per capita income. More than $1 trillion is invested worldwide in the city. In 2010, the GDP per capita reached $49,600, which ranks ninth in the world. Taxation in Abu Dhabi, as in the rest of the UAE, is nil for a resident or a non-bank, non-oil company. Abu Dhabi is also planning many future projects sharing with the Cooperation Council for the Arab States of the Gulf (GCC) and taking 29% of all the GCC future plannings. The UAE has a fast-growing economy: in 2006 the per capita income grew by 9%, providing a GDP per capita of $49,700 and ranking third in the world at purchasing power parity. Abu Dhabi's sovereign wealth fund, the Abu Dhabi Investment Authority (ADIA), currently estimated at $875 billion, is the world's wealthiest sovereign fund in terms of total asset value. Etihad Airways maintains its headquarters in Abu Dhabi.