Iraq posted a slight increase in oil sales last month, around 21,000 barrels per day (bpd) more than in March, but revenues fell by about 5 percent as global crude prices slightly weakened. Nationwide exports averaged 3.389 million bpd in oil exports in April, up from 3.367 million bpd in March, according to an Iraq Oil Report analysis based on federal export figures from the Iraqi Oil Ministry and northern pipeline export data provided by industry officials. *