Angola has overtaken Nigeria as the biggest oil producer in Africa. Nigeria relinquished the position it had held on to for over half a decade in August as the largely oil-dependent economy accounted for 1.13 million barrels in output relative to the Southern African country’s 1.17 million.

According to Bloomberg, losing that ground last occurred in April 2017 to the same rival, when the two nations were production by both nations averaged above half a million barrels daily.

Nigeria has been contending with the twin problems of oil theft and pipeline vandalism. The crisis reached a head between January and March when Nigeria lost $1 billion to crude theft.