The cash-strapped Iraqi government suffered a sharp decrease in August oil revenues, due mainly to depressed global oil prices as well as a dip in exports from both the south and the north.The federal government earned just $3.874 billion in August, according to the Oil Ministry, down more than 20 percent from the $4.908 billion earned in July.Federal exports averaged 3.079 million barrels per day (bpd) in August – a total of 95.447 million barrels – according to State Oil Marketing …