Yemen, one of the poorest countries in the Arab world, reported average annual growth of 3.5% from 2000 through 2006. Its economic fortunes depend mostly on oil. Oil revenues probably increased in 2006 as a result of higher prices. Yemen was on an IMF-supported structural adjustment program designed to modernize and streamline the economy, which led to substantial foreign debt relief and restructuring. However, government dedication to the program waned in 2001 for political reasons.