Under the Islamic Republic, Iran's economy has been dominated by oil and gas exports which constituted 70% of government revenue and 80% of export earnings as of 2008. It has a large public sector, with an estimated 60% of the economy directly controlled and centrally planned by the state. A unique feature of Iran's economy is the large size of the religious foundations, or Bonyads, whose combined budgets are said to make up as much as half that of the central government.