ARBIL, Iraq (AFP) - Trade between Turkey and Iraq increased by 50 percent to nine billion dollars in 2009, an Ankara official told reporters on Saturday in Arbil, capital of Iraqs autonomous northern region. The volume of commercial exchange between Iraq and Turkey in 2009 was nine billion dollars, and in the same year Turkish companies signed investment deals worth eight billion, said the Turkish consul general to Arbil, Aydin Selcen. In 2008, trade between the two countries reached six billion dollars, up from 3.7 billion the previous year. Excluding the oil sector, Turkey is the largest commercial investor in Iraq.